We complain because if they're going to even attempt to balance pvp they should at least try to do it right instead of half-assing it.
their solution to balance pvp: let's give this class more damage and this spec more cc; therefore balanced. it's the only reason why we have so many viable specs/classes. they're viable through stupid gimmicks instead of legitimate, fun mechanics.
I enjoyed the pve content of MoP, but pve isn't enough to keep me playing an MMO. Which is why I don't play mmos anymore. the pvp is bad in all of them because they're made for casual players.