Together with the 4 Maps in the Voting there should be the Option to choose a Random Map. This gives Players that dont want to play the tier 1/2 Maps a better Chance to unite and democratically vote against those. There are downsides to this System like that it would sometimes still vote Tier 1/2 Maps but I still think for playing Tier 3 Maps currently this is the best Choice. And somehow I get the feeling that such a thing existed back in the day, im not sure tho.