remove respawning on the same place where you died (on FFA) and make it respawn on random place.
reasons why:
1) if i win fight with somebody, he can just respawn and annoy me by virusing me non-stop or help my next potential opponents win against me, when needed
2) if i lose fight, my opponents can keep on savaging me every time i respawn
3) during fights teamer can just suicide on his teammate, giving him free mass (particularly problematic for solo players)