If you have made friends via Impulse, or perhaps even are a part of a clan, it would be neat to be able to reserve spots in your game for your friends.
It would perhaps also be nice to let people form teams to join games as well, so for example three players join a game at the same time, and are guaranteed to end up on the same side.
Also, for hapless players joining a server with an established team on one side, there should be some sort of visual indicator warning them about this (and also some sort of rank indication on the players, so you'll know if you are evenly matched or not).
I've never actually been a part of a clan or team matches, but I suspect that this is how it would work.
Perhaps someone who are experienced with clans can fill in some suggestions?