How about a map which could be completed in more than 1 way, like at one point early or midway through the map it split into two separate routes which didn't intersect again, and at the end of both routes was one way of finishing the map each? So depending on a team's tactics it could be two games of 3 v 3 going on at the one time or whatever. Each route would have to be about the same level of difficulty as the other one I guess. I dunno what would happen if a team decided all 6 should go down the same route though lol. I dunno if this is a new idea and actually I've just realised it's a bit OceanFloory but still...