Ok, i know it's basically just an excuse to go around enslaving hot chicks of all pedigrees but the main quest does not really make much sense, why are Elves and Orcs both fighting for human supremacist, you could say they were mercenaries but it is clear they are loyal to the point that they are ready to die for it, so what gives. Also if you let "what's his name" escape with his sister then there should really be a continuation of some sort after that, people like that dude don't just give up, our own history has proven that violent extremists always come back to bite you in the ass sooner or later. Lenin was exiled to Syberia for 10 years and still he successfully pulled off the revolution, examples of this are endless, so after a while that guy should come back, with new army, to challenge you again.