ive got the game and its pretty cool game only think i didnt like it was shorter than the first game. to be honest i think they were concentrating more on the multiplayer side than the campaign. the campaign is lacking a story. the customization of weapons and changing on the fly is pretty good. from what i can tell it has less weapons than the first game, but you can make the weapons how you want.
the AI is slightly smarter, if you wound one of the enemies they will try and crawl and find someone to heal them. though they are real bosses just a few heavy armoured people each of course having their own weakness.
The bosses in this and all games are supposed to have somesort of weakness such as a weak spot or pattern of attack. i dont see how that can be a problem besides the customisation is awsome!
its got some very bad reviews.
Good point.