Kill vs Assist
They need to switch kills vs assists to players who do the majority of damage within a given time period. For example lets say you and your teammate in a standard ranked 3s match you do 75% of the damage and your teammate does the other 25% but hits the last shot. The person who did 75% of the damage should get the kill not the assist. Granted this is probably not that easy of a fix but if i dump out 1 alternator bullet for 15 damage and my teammate did the other 185.. I shouldn't get the kill.
I doubt this will ever be something that gets addressed because it is standard in FPS/BR games for the person who hit the kill shot to get the kill and people are used to it, but it doesn't make sense. I have been on both ends of this where I do almost no damage and get a kill or do around 80% and don't get a kill.