The fact that it's being debated is SO ridiculous that I have to assume it's because she is a woman. I really don't think it's that, I'm not an idiot, but it's a possibility considering the arguments I've been seeing. So many posts hit the nail on the head above that I won't go into it, but I just want to say: Azshara, in the hands of the writers, can and will become a major end expansion boss if they want her to be.
There is no justification otherwise. None of us, as far as I know, are writers for World of Warcraft. So stop saying it isn't likely -- ANYTHING is likely in a fictional game. Deal with it.
I hope, like in Trek, that we're getting a girl finally. And just like Janeway, I'd love Azshara to pieces.