When trying to relearn how to play a spec (in this case all 3 specs), the first thing I do is try and conceptualize the rotation in my head, gather input, and the finally try it out for myself/run sims/etc. So first things first, Here's my idea on the rotation (without the application of cooldowns) of each spec, constructive criticism welcome.
Marksmen:
Spec seems highly based around Seek Vulnerabilities (Hunter's Mark debuff, chance on application by Arcane/Multi Shot) to maximize DPS. Looks like Arcane Shot will be our new instant-cast filler, generating 5 focus. A new ability Marked Shot which cost 30 focus, usable while moving, and has a stacking debuff that increases damage done to the target by 25%. In addition we retained Aimed shot which is just a basic stationary, 1.5 second cast, 50 focus dump. Lock and Load is a new passive that causes our next 2 aimed shots to be free with no focus.
Rotation seems somewhat simple: LnL AiS > MS (to maintain 3 stack AS debuff) > AiS (ideally with HS applied) > AS.
Beast Mastery:
Spec seems based around focus generation of Dire Beast (new focus generator, 10 second cooldown, 8 second duration, 4 focus generated every x seconds). Crit's have a 30% chance of reducing the cooldown of Dire Beast, allowing for more focus regen. Kill command has essentially stayed the same, but is now 20 focus. Cobra shot is a new instant cast, 30 focus dump.
Rotation is really really complex (jokes): Kill Command > Cobra Shot > Dire Beast.
Survival:
Complete overhaul. No direct focus regeneration. Raptor Strike is our basic 20 focus dump. Flanking Strike (6 sec, 20 focus) is our cooldown-base focus domp. Laceration, 25 focus and 10 sec cooldown, is a basic 12 second bleed that does "good damage!". And finally, what I would imagine to be our bread-and-butter, Mongoose Bite. It's an instant cast that accumulates 3 charges, each with a 10 second recharge. It does 50% more damage, stacking up to 6 times, for each consecutive Mongoose Bite applied. Pet attacks have a 20% chance (based on mastery) to grant a charge of Mongoose Bite.
This rotation actually seems a bit of fun: Mongoose Bite Proc (if debuff is applied) > Moongoose Bite (pool 3 stacks before use) > Laceration (keep applied) > Flanking Strike > Raptor Strike.
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Overall, the new changes seem interesting to say the least. I do see however hunters will no longer be good at quick target switching and burst damage with abilities like Seek Vulnerabilities and the whole Mongoose Bite pooling.
Thoughts?