What are you talking about? It's not difficult to keep them together. Not that keeping them apart for a section is a horrible thing. Depends what script your telling. Theres' obviously a demand to see them fighting together more as a team. Are you saying they shouldn't or that it's impossible? It's kind of what X-Men do.
Originally Posted by droidwarrior
The Avengers had that one key scene of them all together back to back, other than that they also split into mini squads or solos and weren't all on screen foghtinh side by side.
They were all communicating and working together in the last battle pretty often. That whole movie is about becoming a team and working together.