I find the Pet Battles a very nice addition to WoW, but I also think it makes the game look less like a immersive world and more like a huge "mario party" themed game. Fuck fighting orcs and exploring Azeroth, I have pets to train.
On a good side, looks like there will be a bigger focus on the whole Horde x Alliance thing. I just wish Blizzard choose to either make them enemies or allies, and stick with it. Being mortal enemies one day and unwilling allies on the other and back to normal enemies the next week is just bad.
Oh, and Jaina, you had it coming after you helped the Horde kill your father.