If there is one thing I will defend SW:TOR on, (and likely the only thing I would defend the game on lawl) it's the race choices. They don't have the ability to get much more creative outside the confines of the IP, and if you look into the Star Wars Universe you'll see that most races are very human-like. To be honest, that's probably the result of the limitations of special effects in the 1970s.
I suppose they could've done Wookies - expansion maybe? Many other MMOs, yeah, not so creative. Anyway it's hard to fault SW:TOR in this case, though I agree that more diversity and the options of more non-human races is better for any MMO.