This is sort of a half-finished thought, but a system of rivals would be pretty cool. The half-finished part is not being sure how it would mesh with MNC. Ideally, I think it'd be cool if it was some longer standing deal, but it might be cool even to just have a reward for getting a pro that has killed you a few times. Protags, or maybe a slight cash boost on the kill, extra juice, whatever. We already reward killstreaks, so it isn't entirely out. I know this isn't a TDM style game, but it's not like these don't happen in professional sports (and fake sports). And pros are killing pros even as they escort the bots down the lane or attack the Moneyball.
Let me just say, I'm bursting full of da'jucies and your going down Red Assassin! BTW i like this half idea.
