Well.... if there's four team alliances... you could go all UFC and have an OCTAGON FIELD...... 4 teams start one side, 4 teams on the other, or even more fun you could alternate red/blue/red/blue/etc. around the octagon's verticies.... </craziness>
In all seriousness, I agree that unless the field was made bigger it would be too congested with an extra two robots on it. It would be eh... interesting keeping that many teams working together though for the coaches... I think three is a good number. Hey i'm arguing with myself. Fun stuff. Yeah. I'm stopping before i start hitting myself over the head....
-q