Interesting concept. Got an plans on how you would do this?
Aside from the obvious issue with teams being of various sizes, each team tends to vary greatly on what they do well. Rather than a direct head-2-head competition, what about a best of competition. Sort of like the Ranger Challenger or the Ultimate SWAT gig.
Here's how I would envision it: Basically you come up with a series of challenges all of which are at the very core based on teamwork where all events are timed. It would be a requirement that each member of the team has to participate in at least 2 events. Some basic ideas are:
I'm sure there are a ton of other options/ideas that could be used to come up with a way to test and score teams. The thing is, if you use direct paintball fighting, you have a difficult time ensuring every team gets an equal opportunity at winning. By using competitions like this, every team should be exposed to the same variables for a better scoring system. I'm just not sure how well that will sell to paintballers who most want to shoot each other.
I think the biggest hurdle is to come up with a common, reproducible method of measuring a teams skills. Having team A fight a random assortment of players selected from a pool does not equate to team B playing a different assortment of players. If you take my meaning.
If you're measuring teams based on scenario type of play, I think it's important to have challenges that test all five of the classes; Leader, Medic, Demolitions, Engineer and Pilot. Perhaps a set situation that evaluates how a team comes to a solution based on quickest time and fewest resources. Stuff like that.
The direct head-2-head is good and all, but I just don't see it as an accurate measurement of teams. I will qualify that by saying, unless everyone uses identical equipment.
There are a bunch of different ways to challenge teams; limited ammo, no re-spawn, etc.
Something that kind of popped in to my head right now is taken from the Mechwarrior universe. A group leader is presented with a situation and known adversaries. They then blind bid what are the least number of resources they can accomplish the mission with. First team to succeed with the least amount of resources wins that round. Not sure that's do-able in a paintball format or not.