I believe that this game should have both individual and team based medals.
The cap for individual medals should be 4 medals and have the same medal system that is in place.
TEAM based medals should be more akin to team achievements. Stuff like "600-0" for winning Alderaan with no points lost, "6-0" for winning Huttball perfectly, etc. It can have team goals, like team-wide DPS milestones and such. There can even be "hardmode" style ones like a "Ultimate Frisbee" medal for scoring in Huttball without any ball carrier moving. These would additively increase valor, commendations, money, and stuff like that.
The incentive would be that individual performers still get their dues, winning and losing still matters, but HOW you win and acts of teamwork could count for a lot. I think it could encourage team play and add in some fun quirks to the game.
Good idea? I know it could encourage some types of bad play if idiots try the tactics and fail, but I believe it would be a nice addition to inspire team effort.