Would be cool to add kill streaks. Like 5 in a row=500 bonus XP. 10=1000 XP and so on. It would also make the races that doesn't have speed buff much more likely to be played. Since you are now rewarded for staying alive and not only for killing.
Could also be an XP bounty. Like enemies get XP for killing you, if you have a kill streak.
What do you guys think?
Regards Hanzii