I am not supporting this. This would just ruin what Skywars is meant to be.
It can take a while to actually kill people if double (20 hearts) or triple health (30 hearts) is voted, it will just be a game of knocking people of the edge.
Also, if someone voted for half health (5 hearts), it would be too easy to kill your opponents. Take this scenario:
You are playing the map Rainbow in Solo Skywars and someone voted for half health. The player who voted for half health selected the kit Swordsman (Iron sword with Sharpness II) and build immediately to your island and kills you in two hits. You have not the chance to do anything.