Okay don't you hate it when your in battle mode and you quickly get tkd or make a mistake and hate waiting for everybody to die to respawn?
Well then you should add to the game mode the ability to be in a small arena inclosed in everymap while waiting for the winning team.
Also the kills don't have to count or you can make it so.. doesn't matter. Everyone can fight a keep respawning over and over it will not be able to help your team just a simple time passer and a great warmup so mistakes won't happen again