It's not about the quantity of classes but the quality. What I've found from games with a ton of classes is that there's always some OP class and always some gimp class. Hopefully, with less classes there will be less need for the juggling of power devs tend to do with patches and updates along the way. If they can get the classes all done right, then I think 8 classes is more than enough and I'll be a happy camper.