Nothing to be perfectly honest, i love wow! I loved it for ages and I'll keep on loving it!! I've played every wow killer and come back to warcraft. I think Wildstar looks interesting and a bit of fun but I know I'll still be playing wow. I would like to hope though that the shop doesn't become p2w, if old per tier gear was to become available dont think id have a problem in that either tbh i just don't think its fair that paying player can get the same rewards as progression players; not that I think Blizz would ever implement such a thing...
My 2 cents...