I don't see why every game that comes out has to 'do something new' or 'innovate' isn't it enough that its a fun game to play and looks pretty?.
That's cool, I like lots of games even if they don't add anything new as long as the total package is nice, like COD4. It seems though that many are unhappy with KZ2 reviews that claim it doesn't add anything new to the genre, so I assume I missed something. For example, Crysis added that nanosuit which I thought was neat and allowed the game to be played in different ways, maybe KZ2 had something new like that that has not been mentioned or overlooked.