It will be super cool if you can set different potion effects that players will have at the start of any game. For example, since teleportation can take a bit of time and it's not done simultaneously, I like to give my players 30 seconds of Slowness II, so nobody can move until everyone has spawned. Currently I'm doing this using command blocks, but having it in a settings file would be much more efficient and easier for people who create their own games. ^^

Thanks!