Balance issues of Demon Hunter class in wotlk

Hey everyone, just wanted to start a fun discussion for those of you familiar with the demon hunter class. I have played demon hunter casually, and found the class to be extremely fun and it got me wondering, what would wotlk look like with the demon hunter added as a playable class? Please note this thread is not a suggestion, but more of a "what if" meant to generate thoughts about how balanced such a new class would be. Would it be OP? Would it not even make meta? The pvp implications of such a mobile class would be interesting to say the least. How would it fare against each class in wotlk in pvp? What responsibilities would such a class have in ICC? Sky is the limit with ideas and thoughts. Would love to hear some opinions!