I don't know that classic is the place for class balance. Like others have said, if you want to play a viable boomkin, look to retail. Same with ret if you want to do end-game stuff. You also have to look at viable CC, which only a few classes had back then (like Ret didn't).
I'm not a classic purist, so if they were going to rebalance classic, speaking as a hunter, I would hope that some changes like deadzone removal for hunters and replacement of mana with focus would make it into the game. But again, that goes against the whole idea of Vanilla, so who knows.