Consider,

I did the sims with 3-13-55 OB (7181 dps) and not 0-17-54 OB (7210 dps). The difference is bigger then to 17-0-54. (7247 dps - 0,5%(Subversion) = 7211 dps).

And i don´t really buy your argument about the AoE loss. WP has more chances to proc. Don´t forget that you have 5% more crit. Only two more procs in 20 seconds (which is possible with 5% more crit) would close your AoE-gap.

Anyway, i just wanted to point out, that you could change specs right now, if you want to get back to SS as soon as possible. My own gear has far more haste, for me changing right now is pure win.

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Another sidenote:

D&D every 20 seconds:

Let´s start with diseases, pestilence and then drop D&D.

0	1,5	3	4,5	6	7,5	9
PS	IT	Pest	D&D	DC
10	11,5	13	14,5	16	17,5	19
PS	IT	Pest	BB	SS	DC	DC
20	21,5	23	24,5	26	27,5	29
PS	IT	Pest	D&D	DC
30	31,5	33	34,5	36	37,5	39
PS	IT	Pest	BB	SS	DC	DC

Repeat this Rotation.

How would you change that rotation with D&D on 15 Seconds-CD? You would destroy the entire rotation. You could not target D&D before the necessary runes come off CD. So the point about the delay does not really fit.

You won´t win anything really with the shorter CD on D&D. With 15 Second CD on D&D you could D&D in second 23 instead of 24,5. Winning only 1,5 seconds, but delaying and destroying your further rotation.

0	1,5	3	4,5	6	7,5	9
PS	IT	Pest	D&D	DC
10	11,5	13	14,5	16	17,5	19
PS	IT	Pest	BB	SS	DC	DC
20	21,5	23	24,5	26	27,5	29
PS	IT	Pest	D&D	DC
30	31,5	33	34,5	36	37,5	39
PS	IT	Pest	BB	SS	DC	DC

If this is meant to be an AOE rotation then you dont really need to repeat PS+IT, simply switch target and use Pestilence effectively saving yourself U+F runes

I just tested the SS glyph combined with the GoD. It works as expected, GoD doesn't reset the SS counter.

Haste becoming valuable plays no role on weapon speed (well, no important one).
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IUP is not a dps boost. Using UP automatically brings your GCD to one, which kills half the (presumed) reason haste is so relatiavely valuable now. What more is the fact that although 17/0/54 uses more GCDs than can fit in Blood normally, it doesn't use enough for Unholy - in Unholy Presence, you would have empty ones, which kinda kills it. I tried various sims with UP/IUP and couldn't get it to be a boost, and there's really no reason it should.
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As I said, the difference is very slight either way with the current specs. The reason I used 0/17/54 in my comparison is simply because it was the first option from the drop down menu and because at the gear level of the 2H ulduar set, it would indeed be superior, and if the idea was to see if switching now was a dps gain, that's the comparison one would want to make. As I said, there's nothing wrong with switching specs now, and it is indeed quite viable, but it's not a dps boost (well, with your numbers, I guess it's a boost of 1, but a margin that small is just going to be covered up by RNG one way or the other).

The WP gain wouldn't be enough to undo the already discussed Blood Boil loss. Not quite. Does narrow the gap though.

You can DnD in your chart at 19 seconds. And then at 34 (you can simply apply/spread diseases afterwards, and they won't have dropped), etc, etc. So on and so forth. You can certainly make use of that extra 5 seconds off, so I am not quite understanding what you are getting at. You can DnD every 15 seconds without running in to the problem of it coninciding with diseases needing to be applied/spread - because you have a 5 seconds window in which to apply diseases after when you normally would have (since diseases have the 15s duration yet are normally applied every 10 seconds). Hence if you used DnD at 34 because you had previously used it at 19, you would then PS/IT/Pest on 35.5/37/38.5 (your last pest was at 23 seconds, meaning that diseases fall off at 38. So long as you have even the slightest bit of haste on your gear, plus the haste you get from raid buffs, it will make that cut off. Even if it were not to, you could just delay using that pest at 23 until 24, as it would have made no actual dps difference since your DnD doesn't come off cooldown until 34 anyways).

So, yeah, Morbidity = you can use DnD five seconds sooner then you otherwise would, giving you a 33% increase in DnD damage over an infinite period of time (10/15 seconds over 10 / 20 seconds = 1.33). In reality, it's obviously not that large of a gain since fights are not of infinite length, but to say that third point is meaningless is quite incorrect. You do get something out of it: exactly what it says, the ability to use DnD five seconds more often (something which is completely doable without losing dps, so long as you actively think about your rotation).

With Epidemic, yes, making full use of that last point of DnD becomes difficulty because you don't you have little leeway as to win you refresh your diseases normally and when you would if it gets pushed off. Without Epidemic, you don't have that problem since you have a 5 seconds - 3 gcds, the perfect number - window each and every time.
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I tried using a PS + IT build, but couldn't quite get it to work. The reason why being disease clipping (which will be a bigger loss than ever with 4p t9), Sigil of Virulence (you would lose its proc in such a spec), and gcd limitations (you can switch to UP, yes, but then that entails its own tradeoffs). I did not try PS + IT with DRM, but that's pretty much going into the old IT x6 rotations of Frost, practically. Although it may be viable, it would almost certainly be better to do it DWing, since the only abilities being affected by weapon damage would be BS/PS.

Another thing to keep in mind is the fact that if GCD availability is the primary benefit of haste for Unholy in 3.2.2, it'd be good to determine the exact point where it no longer provides needed GCDs and what it's EP would be after that point.

Basically we have 22.5 seconds currently worth of spells in the Reaping-less rotation, so the question is, considering not all of the abilities we'll be using are spells, how much haste would it take to chop 2 GCDs off the rotation?

8 of those GCDs are melee attacks, and 7 are spells.

So we need to chop probably about 2 GCDs off to make room for latency/user reaction speed.

So we'd want, what, about 29-30% haste then, optimally, no more?

Edit:Actually, I'm only coming up with 12-13 GCDs per rotation, not 15, what am I missing?

IT PS BS BS SS DC (1 second gap) SS BS BS SS DC DC is 12 GCDs+1 second, 13 GCDs when RP overflow allows a second DC during the first runeset in the 1 second gap. That's 19.5 seconds, just barely within the 20 sec rotation.

You're missing a horn and another DC in the first set.

Losing BBs is an Epidemic issue, not a Morbidity issue.

In the case you're talking about, you can instead spread diseases at 34.5 and DnD at 37.5 (which is 18 seconds from your previous one. Still a gain over 20 seconds. If you wanted to keep going, it would essentially fall like that - 15 seconds between DnD and DnD, then 18 seconds, then 15 seconds, etc). Although perhaps not the full gain, it is most certainly a gain. It just doesn't make a for a "clean" rotation. Priority system ftw?

Also, beside the point, but you should SS before BBing. SoV proccing and all.
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I was trying to figure that out earlier. With 15 GCDs, you're at 22.5 seconds. You could bring that down to as little as 19 seconds (7 spell gcds, minus 0.5s each). Optimally, you would bring it down to 20 seconds.

However, if you bring it down to 19, you have an extra second (which is an entire spell gcd at that point), which would allow you the perfect place for Ams/Revitalize -> DC dropping. So, yeah, going all the way to the spell gcd cap should be fine. I doubt you'll get all the way there in BiS, but it does mean you shouldn't worry about getting too much of the stat. There just isn't that much of it on good gear and, unlike hit and the like, it isn't worth going out of your way to cap or anything like that.

You have the rotation wrong, which is part of where you are missing GCDs. Remember, no epidemic and no reaping. Thus:
PS IT SS BS BS DC Horn DC // PS IT SS BS BS DC DC = 15 GCDs and not a single RP remaining.

@ Qaenyin:

You miss the point of No Epidemic...

PS-IT-SS-BS-BS-DC-DC every 10 seconds. (gaining 79 RP every 10 seconds without HoW)

You have to use IT and 2x DC in 4 sec. Therefore needing a GCD of 1,33 sec with no Latency.

1.50 / 1.33 = 1.1278 You need would need about 13% Haste without Latency.

Factoring in Latency (150ms) - Seven abilities - 1050ms - Let´s say one additional second.

So you have to use IT and 2x DC in 3sec. (4GCD for melees = 6 secs, 1 sec Latency, 3 sec remaining)

You need an GCD of 1sec to do this. Therefore needing 1.5/ 1 = 1.5 -> 50% Haste

I don´t think, that you will ever reach that number as Consider mentioned.

@ Consider

You forgot the the RP gain from Butchery. I think that HoW will be a dps loss (One HoW every 100 sec would be enough). But i am not sure.

As a BloodElf you could even produce 15 RP every 2 Minutes without ever using HoW and therefore you won´t lose that GCD.

So, I've read through the whole thread, and I didn't see a reason why we shouldn't pick up black ice. Is it because 4pc t9 makes the crit from blood better? If so, then what if you don't have 4pc t9 yet?

Might be better suited for the BiS thread, but I'm showing [Comet's Trail] trumping [Darkmoon Card: Greatness]. Are others getting this result with their sims as well?

edit- This is with the no-reaping, no-epidemic build, of course.

I must be missing something, could you clarify how you end up with 79RP/10secs?

I see
PS=10RP
IT=10RP
SS=20RP
BSx2=20RP
Butchery for 10 secs = 2RP?
Total=62RP

Glyph of Icy Touch would throw in another 10RP bringing the total to 72RP