The Evolved are, well, evolved humans. Genetic freaks, they tried to eek out a living on the surface and mutated into environmentalists with skin conditions. The new boys on the block are the Series 9, agricultural units who are choked that humans ruined their livelihood. The interface is clean and quite non-intrusive. Instead of a status bar that dominates the screen there is an expandable bar that extends with a click.
Building is a snap, as the interface allows for multiple unit building with little difficulty.
The graphics are clean, though nothing that you would not expect given where we are in the rts evolution. Violence and cleaning tips all in one game. The biggest plus for KKND2 is the humor. Compared to the drab humorless other entries, Beam stands head and shoulders above the others for their effort in trying to inject a bit of levity into the genre. War may be Hell, but it is also prety damn funny sometimes.