I see there are beastmen included in Chaos rooster, which fact makes me very happy, but still that's the only thing I miss about old COW:CS. I liked those small encampments you had to be aware of as empire, scattered around the world map.
No chance to bring them back, even as just AI faction? It'd be cool to have them somewhere near wood elves, they're meant to be their main opponents.
PS: An hour of playing as Tzentch went gone after I forgot that besieging other chaos settlements is... Huge mistake