What is disappointing about the game? Nothing. So the AI are a bit stupid. No game killer. Play with friends. I was extremely satisfied with this game. Yes I would buy the second one.
But, what if we don't want to play online or if the PSN is down? Some of us
want to play single-player (I've always played Campaign of various FPS'se and I enjoyed those) and some of us
have to play single-player due to PSN being down.
So telling us to not complain about or just ignore the somewhat horrible AI because we should ignore one part of the game-package (that SD advertised as being a viable option of the experience) will not solve the AI problem or our dissatisfaction on that part.
I'm kind of glad some of the reviewers see that AI is still important, no matter what kind of game it is, and thus rate Brink accordingly on that aspect.
SD has to fix some things so this game can reach its full potential and retain its audience or attract new audiences, etc.