Instead of having a few maps in circulation, have all maps with a random chance of being selected, similar to the wheel of fortune. No more pick and ban between 3 maps that no possibly wants to play in the first place.
3 maps are randomly chosen out of the map pool. You get to vote which one out of the three maps you want to play on. You are suggesting instead to have the game randomly pick a map without voting. More people would be angry at the lack of choice.