Don't get me wrong, I love the devs of this game and all, and I love this game. They are great people, its a great company, its a great game, blah blah. But the game you have now is not balanced correctly. What do you expect to happen to balance after you add all this new stuff to it?
This is the overriding issue of why I, personally, will not be spending money on this expansion. But I guess all you guys either don't care, or the newness of the bright shiny cool new toys outweighs balance concerns?