I can confirm that bleed damage is fixed at the time that the bleed is applied. Letting Savage Roar drop will not cause later bleed ticks to lose strength.

Edit: Also confirmed that that the bleed crit multiplier is 1.5 base X 1.1 PI X 1.03 Relentless meta = 1.6995 total.

This is an interesting change.
I tryed to figure if the rewamped Starfall glyph will increase the damage done and is worth it.
Lets assume one single Starfall is doing 14K damage to Patchwerk for each cast:

Without glyph of Starfall
fight duration:
2'20" -> 1 starfall cast -> +14000 damage done
2'50" -> 1 starfall cast -> +14000
3'20" -> 2 starfall cast -> +28000
3'50" -> 2 starfall cast -> +28000
4'20" -> 2 starfall cast -> +28000
4'50" -> 2 starfall cast -> +28000
5'20" -> 2 starfall cast -> +28000
5'50" -> 2 starfall cast -> +28000

With glyph of Starfall
2'20" -> 2 starfall cast -> +28000 damage done (+100%)
2'50" -> 2 starfall cast -> +28000 (+100%)
3'20" -> 3 starfall cast -> +42000 (+50%)
3'50" -> 3 starfall cast -> +42000 (+50%)
4'20" -> 3 starfall cast -> +42000 (+50%)
4'50" -> 4 starfall cast -> +56000 (+100%)
5'20" -> 4 starfall cast -> +56000 (+100%)
5'50" -> 4 starfall cast -> +56000 (+100%)

So it looks like a nice upgrade for shorter and longer fights, with a +100% damage from Starfall.
But the glyph is a major one, so we must trash another, probably the IS one I'm using now.
If so, the damage lost for not having IS glyph is worth the SF glyph?
My current IS ticks for 773 average damage. Assuming a cycle of one IS cast every 17 seconds:

IS damage with glyph
2'20" -> 43288 damage done
2'50" -> 54110
3'20" -> 59521
3'50" -> 70343
4'20" -> 81165
4'50" -> 91987
5'20" -> 97398
5'50" -> 108220

Without the IS glyph the damage lost if the 30%:

IS damage without glyph
2'20" -> 33298 damage done
2'50" -> 41623
3'20" -> 45785
3'50" -> 54110
4'20" -> 62434
4'50" -> 70759
5'20" -> 74921
5'50" -> 83246

In ideal condition, with IS up and mixing Starfall:

damage done by IS+glyph and normal Starfall
2'20" -> 57288 damage done
2'50" -> 68110
3'20" -> 87521
3'50" -> 98343
4'20" -> 109165
4'50" -> 119987
5'20" -> 125398
5'50" -> 136220

damage done by IS and Starfall+glyph
2'20" -> 61298 damage done (+4010 damage)
2'50" -> 69623 (+1513)
3'20" -> 87785 (+264)
3'50" -> 96110 (-2233)
4'20" -> 104434 (-4731)
4'50" -> 126759 (+6772)
5'20" -> 130921 (+5523)
5'50" -> 139246 (+3026)

The math here shows the new glyph is not so powerful against raid boss.
What do you think? Have I missed something?

You need to account for the global cooldown lost (i.e. the damage lost from that cast time) when activating Starfall the extra times.

Benefit of berserk:
Mangle every 1.4 seconds. (Assuming some haste).
Perfect versus 3 targets.

Downside of Berserk:
You loose out on not being able to use maul.
You will not build up a lacerate stack. Meaning on the whole fight you are missing 20 seconds (glyphed) of lacerate ticks.
With 4 or more targets it is pretty useless since you will swipe.
With 2 targets you can not use maul since you need the white hits to generate rage.
With 1 target about the same.

No doubt berserking is better in total on threat generated. You can indeed use it. But is 5 seconds extra berserking really worth missing a taunt 8% of the time? Like I said, a missed taunt can wipe a raid, the lack in threat of missing 5 seconds berserk might require the dps to do a bitt less dps, extending the fight by 3 seconds every 3 minutes the fight takes.
A overagro might wipe the raid too, but if somebody overagro's they are idiots. It is their responsibility. They should watch omen and just hold dps for 3 seconds.

Haste does not reduce melee GCD. You cannot mangle faster than every 1.5 seconds.

Start with an Enrage, Berserk, Barkskin, and then spam Mangle and Maul. With KotJ this really gives a great initial threat boost. I find it pretty much essential on Maly and Sarth. You don't need to stop using Maul unless you are getting rage starved. Bosses hit hard enough that rage is not an issue unless you get a large avoidance streak.

I completely disagree with your analysis of Berserk. I would always take it in a tank build. However, I do agree that the glyph itself has marginal value at best. I've never used the Growl glyph and never caused a wipe due to it. I might consider it with dual spec though.

Completely agree. Although, I make sure to get a couple of lacerates up before I hit Berzerk and I spam maul/mangle at the same time to take advantage of Rend and Tear. Like you said, very rarely am I rage starved.

An odd question, but one I'm not sure of:

How fast do tank druids attack? Is the assumption that this shield should be up on each melee hit with the exception of very fast hitting melee bosses?

If you're not looking at 100% uptime, then your baseline mitigation changes for each boss, Additionally, even if it works on magic, it would still be pretty insignificant. Most magical attacks hit for either a single shot for a great deal more, and there is no previous mitigation from armor, or hit very often, so would pop off the shield more rapidly than the tank might proc it. For bosses that would do 15k damage or so (slow hard hitting bosses), the shield will be up all the time, but at 5000 AP would provide 8% or so mitigation. I don't think you would get worse mitigation from 5k Armor until 45k armor. Even then, the 5k armor mitigation would apply against the faster low hitting targets.

Maybe I'm looking at it wrong? It doesn't really seem like a buff to druids who might be losing 5k or more armor from SotF, especially if they aren't already packing 5000 AP or more.

EDIT: I suppose that if most Bear tanks are expected to be at or near 45k armor before Ulduar and Ulduar will push that up even more, then value of Savage defense scales in a way armor does not. If that was the purpose, then I suppose I can see it.

The wording on the Savage Defense tooltip makes me very curious. I'm assuming since it says "melee critical strike," that this refers to any white swing or maul/mangle/swipe/initial lacerate application, but that it does NOT apply to lacerate DoT ticks. However, tooltip wording is not known to be the final authority on spell mechanics.

If lacerate tick crits could proc SD, this would turn lacerate from a low-priority threat ability solely for bigger Maul hits into a somewhat useful mitigatory ability. I'm also curious to see some testing on SD in mass swipe scenarios. I'm sure we're all hoping for no ICD, or at least no greater than one second.

Savage Defense isn't implemented on PTR yet so we can't test it.

Currently I have over 100 str gemmed into my gear and ruthlessness. With the SR change Str loses its definitive edge and Gore makes agility that much more sexy. If I resocked agi and picked up a strong handed or surge needle I would be up to around 1100 agi unbuffed. Is there a DR on agi => crit% that would make me not want to fully resock?

Currently sit around 7350 AP static unbuffed with 47% crit.

Also sitting on a nobles deck... trade in for the agi version? Glad I didn't have it 2 weeks ago I would have grabbed str deck for sure.

I run with a Arms warrior, so I'll be running Shred/Rip/SR glyphs now.

I wouldn't be surprised to see FB being worked into the rotations even more than usual now.