Bringing back this dead horse for fun.
Watched a veritasium video on voting. Seems like objectively the best voting method.
TLDR: just let players click on what maps they'd like to play on. No limit to number of picks, no rankings, just click on what maps you're cool with. Pick the one with the most number of approvals. In case of tie, roulette between the tied maps.
Is basically a "yea I'm good with this one" system. Ties will form mostly from players who wanted most of the tied maps.
If you wanna be funny, you could have a 0.5% chance for ties to go to the map with the lowest approval score.