One thing I have seen countless times in Coop matches is; 1 player always rushes ahead to capture the point before anyone else has a chance to help capture.
My thought is, (as this is meant to be a team based game mode) there should be a certain amount of people on the point before you can capture, instead of first come first served. I feel at least half the team that are still alive should be able to capture the point.
For an example: 8 players in the server, 3 are dead, there should be at least 2-3 players on the point before you can capture. Otherwise, what's the point in playing as a team when all it takes is one person to steal and capture all the points?