So, I'm going to keep this short and sweet and explain why I likely won't continue playing the game when my sub runs out.
I played vanilla on a warrior, TBC on a mage and rogue, WOTLK on a mage and rogue, and didn't play any of cata. I resubbed and played for 2 months or so pretty casually, leveling my druid/mage/warlock/hunter up to 90 and working on professions and such.
- Classes no longer feel special or have signature abilities. Sure, warlocks have green fire and druids shapeshift but everyone seems to have a VERY similar counter or cooldown to one another.
- The game is overwhelming to keep up to date with (both information and gear) compared to other non MMO / possibly mmo PvP centric games. Truly "learning" a class requires playing it at max level, with gear changing, patches having drastic remakes of classes far more often than I remember, etc it just isn't possible without dumping huge amounts of time
- There are NO counters or balances in the game. Everything is generally similar in terms of ability, utility, output, etc (See: Homogenization). Previously mages countered melee, warlocks countered mages, rogues countered clothies, etc. It was just accepted and created a draw for a player towards a specific class.
- HOMOGENIZATION: EVERY class offers EVERYTHING and does EVERYTHING. It's annoying, it's stupid. All of the classes at this point (aside from the healer/tank/dps spec differences) are very similar and there isn't anything really exciting or interesting to draw me in to a specific class
But, ignoring all of that, this by far gets me the most (After playing a week or so on the PTR with equal gear..)
Cheesing in this game is absolutely ridiculous now. BM hunters kill in an instant, Ret paladins kill in an instant, Destro kills in an instant. They all seem to offer NOTHING for PvP outside of a CD blowing cheese that (a good majority of the time) can negate any cooldowns or counters the opposite class has. With my rogue, moreso than ever, I feel that I am completely screwed if one of these specs catches me without full defensives. They can cheese anyone they'd like as long as cooldowns are up 100-0 in seconds, usually in a stun or CC.
Even my frost mage feels that way. Previously a chaosbolt/conflag from a destro, BM wrath, or mage shatter rotation was downright scary. It definitely set people back and you avoided it at your best... but it didn't flat out global (or near global) people. Now they do. Equal gear, equal playing field, and the cooldowns and combos certain classes can blow up with are freaking nuts.
It appears that PvP is at its most imbalanced in terms of stupid burst and burst setups. No longer do duels or arenas play like chess matches with counters, reactions, and offensives. They're just pure burst battles to see who can cheese who the fastest. It's pretty damn stupid.
So, between overall homogenization. Not being able to pick a class (largely related to homogenization) and absolutely out of control burst I'm seriously rethinking picking WoW back up.