All these cave-dwelling "needs moar tits" morons need to get lost. Some of the proportions are a little off, but not in the breast area (gnome/goblin torsos a bit too long, for example.) I particularly like the kaldorei druid. As a whole I think it looks great, and good on you for sticking to your guns about the boobs.
It's a great job, the tits comment is correct, but could have been said better. Since none of the characters are "to scale" I mean we all know goblins, gnomes, and dwarves aren't that close in height to all the other races. I'd have also like to see a Pandaren Horde.
But like I said, great job, I like how you gave them different classes.