They should make it so that you can vote for infection maps and the highest map gets picked. Like /vote (map)
Support! maybe add a feature so in spawn every time a number on maps come up listed 1-5 (or another number xD ) then you do /vote <Number> ? well support anyway ;p
This would be abused too much. Only a few maps would be picked, while others would probably be ignored.
No Support, the reason very popular servers has this is because they have a lot of players on that minigame, everyday. We only get like, 10-20 people whilst those servers have 30-60 on.