I'm working to update the main post for 5.2 and here are some interesting notes on some of the new stuff coming in patch 5.2.
Trinket:
Rune of Re-Origination
Heroic
Item Level 535
Trinket
+1657 Agility
Equip: When your attacks hit you have a chance to trigger Re-Origination. Re-Origination converts all of your Critical Strike, Haste, and Mastery into the highest of those three attributes for 20 sec.
0.46 RealPPM on landing harmful abilities and spells, and melee/ranged abilities and swings. 22 sec ICD
This is somewhat interesting in that it will allow you to pull off some interesting things depending on talents and set bonuses, and it also has some pitfalls.
For example, with the new 4pc set bonus for Ferals, granting us 40% bonus crit on the next three mangle, shred, or FB casts, it will be easy to go above the crit cap with this trinket, if your crit is higher than your mastery. (Which it shouldn't be, as of right now.)
On the other hand, if you were to try to make a HotW wrath spam build again (with the new, higher, wrath SP scaling and a good epic weapon) and you were reforging into haste, this would convert all your useless mastery into haste during your wrath spam phase (and all of your crit as well). This could have you GCD locked during Heroism, but wouldn't during a non-hero wrath spam phase. That said, during non-HotW you would also have your, now very useful, mastery converted to haste.
Oddly enough, this may point to a HotW build that uses wrath spam for hero burn phases or Hurricane during mass AoE phases reforging such that when your caster staff is equipped, your haste > your mastery, so that mastery willbe converted to haste for faster casts, and when your agi staff is equipped, your mastery > your haste, in order to gain some very spec/phase tailored benefits from this trinket.
Renataki's Soul Charm
Heroic
Item Level 535
Trinket
+1,657 Expertise (4.87 at L90)
Equip: Your attacks have a chance to grant Blades of Renataki, granting 1,505 Agility every 2 sec for 20 sec. (60 sec cooldown)
While a nice, but otherwise somewhat ordinary trinket, like other stacking trinkets, this provides a staggering 15k agility when fully stacked, giving you a window to line up an extremely powerful set of bleeds, particularly if you can line it up with a potion, TF, DoC, NV, or other bonus damage cooldowns. This is particularly potent if you can get in a rip at sub 25% to refresh. Other than that, however, the expertise is fairly mediocre for Ferals.
Talisman of Bloodlust
Heroic
Item Level 535
Trinket
+1,657 Agility
Equip: Your attacks have a chance to grant you 1,736 haste for 10 sec. This effect can stack up to 5 times.
3.00 RealPPM on landing harmful abilities and spells, and melee/ranged abilities and swings. No ICD.
The interesting thing about this trinket is the high, 3.0 real PPM rate with no ICD.
Assuming each attack takes place between 0.4s and 1.0s from the last auto attack, special ability, or DoT tick this will give, on average, every auto attack and melee attack around (assuming reforging out of haste, 10% haste, raid buffed.) between 2.25% and a 5.50% chance to proc this trinket, usually on the lower end.
On average, assuming 100% uptime on bleeds, in the 10 seconds of uptime this trinket has, we will see 11 auto attacks, 5 rip ticks, 3 rake ticks, possibly 3 Thrash ticks, and perhaps 2-4 mangle/shred/ravage/FB depending on OoC procs, berserk, etc.
Realistically, that would be in exactly 10 seconds, assuming things line up perfectly, so we're likely to get one less auto, one less Rip tick, and maybe two special abilities on average. That boils down to 10+4+3+3+2 = 22 proc events within the time it would take the buff to expire. This boils down to an average proc chance of 2.475% per event. This ends up becoming roughly a 42.4% chance to refresh the proc before it expires.
If you follow the statistical chain:
Chance for refreshing in 10 second window before buff expires: ~42.4%
Chance of reaching 2 stacks from 1, before expiry: 42.4%
Chance of reaching 3 stacks from 2, before expiry: 42.4%
Chance of reaching 3 stacks from 1, before expiry: 17.98%
Chance of reaching 4 stacks from 1, before expiry: 7.62%
Chance of reaching 5 stacks from 1, before expiry: 3.23%
Chance of reaching 6(refresh of 5) stacks from 1 : 1.37%
Thus the odds of ever getting to a significant amount of stacks for any prolonged period of time is extremely low. This doesn't take into procs external factors like haste, including the haste you gain from the stacks, so it's not perfectly accurate. Given how poor haste is for Ferals anyways, it's not like it would do a ton of good for us, but it's worth noting how rare numerous procs will be for Ferals who don't stack haste.
Even accounting for haste, assuming a feral is somehow reforged to 40% haste, you still only end up with a couple percent higher chance to ever reach 5 stacks, though the chance of getting to 3 stacks is substantially higher (26%).
Capacitive Primal Diamond – 15.00 base RealPPM on landing melee/ranged abilities and swings. No ICD. At 5 stacks, fires Lightning Strike, which deals [280 + 75% AP] Nature damage. That base proc rate is multiplied by an additional coefficient by spec:
15(ppm) * 1.934(feral coefficient) * 1.1(haste) * .45(time since last chance) / 60 (sec per min) = 23.9% for a stack on hit, tick, or ability
Thus we will get a full 5 stacks about once every 8.36 - 16.08 seconds assuming an average of between 1.3 and 2.5 proc events per second. I'm not sure if dot ticks will count, but it doesn't look like it, which would skew the results towards 1.3 and away from 2.5 proc events per second.
I will be working out, when I have access to WoW, how much AP Ferals in Heroic T14 gear have in raid, to take a guess at how much damage a Feral in T15 ilvl gear will have in raid and work out the aproximate dps of the legendary meta, but a rough guesstimate would put it at 1,500 to 2,500 dps.