Too early to say. But I have some concerns. One of them is the class revamps. They took the most played class in the game and turned of one its specs into a melee spec. That's quite a risk in itself. Dunno about others but I played hunter because it was a ranged class. So that leaves two specs. When BM hunters get the artifact they will have to walk around with two animals following them, which from a gameplay point of view can get quite annoying.
Also the destruction warlock mastery and its effect on chaos bolt is bad.