Add a speed boost power-up in ground wars which would last 10 or 15 seconds, it would just make the player sprint faster like the ones in block drop and murder mystery. I think this boost would help someone trick others to ruin their timing to shoot someone, or to get away from a dangerous area as quick as possible, which could be useful in that kind of situation, etc.
Yeah this is a good idea, though remember you can vote on your own idea.