I heard that they have dropped a few classes, because the game wasn't going to be finished in time otherwise. Some of those classes were pretty major. They have also dropped a few capital cities, which has a big impact on the game (given that one of the main features is that you can conquer said cities). These things will probably be added in a patch/expansion later. I haven't got the details right now, and could be wrong (I've read an article a few weeks ago).
Personally, I think I'd prefer a 40K game. But this might also be fun. Of course, I try to stay away from internet gaming; I know I'll get addicted, which is bad for my health.
