I wish for another stat right below K/D: KA/D. That's right, kills and assists per death. Assists are important too. They indicate team-play, even when unintentional (people going for high K/D) I actually feel that the KA/D ratio is far more important than straight K/D because of this. Plus, mowing someone down then having a sniper pop the guy while he has a sliver of health with his exploding rounds can be irritating. Also, maybe a one-shot bonus of 25 for 5 assists in a single life?
I'll be honest. I'm trying to come up with a reason this should happen because I don't really like the idea, but I can't come up with anything. I like the assist streak thing though. Would help supports if they did a little hurt gun damage as the followed a gunner.
I do wish assists and bot kills had more of a place in the game, since this isn't supposed to be a TDM game.