Yeah, see... you have no idea how boring that is to me. "Teamwork" in that case means pressing buttons at precisely the right time at precisely the right targets to maximize offensive output from your whole team and such. That's all fine... but you actually find that fun? It might be fun if you were controlling every single character and trying to pull it off on your own in a frantic bid for the extraordinary, maybe for some finely balanced SP game or something, but you pair that up with being one cog in a big machine and all you end up with is a big heaping pile of boredom in my book. I don't get it. If I'm going to bother being competitive, I want it to be competitive. Even if I lose, I feel like I lost for a reason, not because some chump next to me hit the 5 key on his keypad too fast.
I don't know. Whatever the reason, this aspect of the game doesn't appeal to me one iota. I'm there for the ability to do something fun with other people I don't hate, and for the fiction. That's about where it ends.