It's hard to tell if a map is actually enjoyed or not if it is not rated enough at the end of a map cycle. My idea is to reward players the first time they rate a map, so we have a larger sample size on whether a map should stay. Currently, people only really vote if it's their favorite map or if they have a really negative experience which doesn't really help. Another rating such as "meh" could also be added if you're neutral on a map.
TL;DR: reward players for rating a map.
TL;DR: reward players for rating a map.