Why does everyone hate the aliens so much? I liked it just as much as the first part of the game. But I agree on the second point. Unless you have the twitch reflexes of a god, you need to go invisible. At least until you get behind them.
It isn't even remotely optimized, same as last game. Basically if you loved Crysis and wanted different levels this is it.
Anyways, first I played the entire game through on hard. I didn't have to go invisible often. Also "It isn't even remotely optimized" is wrong, I can play it one MAX low with 20-30fps on a laptop that can't even play CSS with more than 24 people without completely locking up in lag. It was defiantly better than the first Crysis I think and it was much more fun. It did have a lot of cut scenes but I enjoyed that. Normal for me was to easy, if you are good at fps's at all go ahead and do Hard.