Knowing that if I have issues getting my set bonus I'm going to have to suffer Loot For Retards because Blizzard decided that they needed raiders to carry the terribles again.
The change to Survival Hunters. That spec belongs with BM as it's got all the aspects and about bonding with your pet. It basically screams Rexxar, for the love of the Old Gods.
Taking dispatch away from Assassination. Blindside added something else to do besides spam mutilate. Garrote doesn't give that same satisfaction, frankly.
Follower missions again. Look, no matter how you slice it this is a garrison 2.0 . We have followers, they gain levels, you get beneficial shit from sending them out on missions. I've been messing around with it on the beta and it's still awful.