Well, the REASON you create teams is that these people were brought together to work for one common goal. Besides, it'd be boring if all the characters in one game end up in one team, you already know each and every single advantage and disadvantage those characters have to offer, and you'll only end up tweaking a little bit of here and there. I know they're not together in a party, but at LEAST you know what the other characters are like, and how they play. You only need to do minor adjustments and that's that.

As for the team idea, heck, the mod and his other judges in this forum already have trouble keeping each and every one-VS-one battle balanced, what more with teams! Besides, this is just an idea brought forward, and I'm pretty sure we'd be seeing something like this (or not at all) once they've got all their battle plans all sorted out. As you said, this forum isn't that very busy lately. I guess this is what this thread for (and the other one as well).

Life is short.
Let's all grab a BEER~~~!!!