There should be a way to put a tag on your map that means the map is meant for matchmaking, then there could be a playlist where people can play all these tagged maps. Since there would be so many maps the odds of playing the same one too times would be very slim. There could also be a detector that makes sure there is enough spawners to spawn everyone, also if there is a game type that is made for a map you can tag link it somehow so when that map is selected it will always be played with that game type. Thoughts?
Everyone would flag their own maps regardless of whether or not those maps are Matchmaking-suitable, and there’s no automated way to detect map balance, design flaws, exploits, et cetera before they become a problem. It would just be a playlist full of broken, half-built, terrible maps.