I'm going to try something - once a day, I'll try to check the EV1 pub server, and, if nobody is playing, I'll remove the current map from rotation and replace it with a suggested map. Hopefully that will help keep things fresh.
Rules for suggesting:
- Only complete maps will be put into rotation (no unvised, unlit, beta, etc. maps)
- One suggestion per person per week.
I'm basically doing this with the beta server (but putting up new beta maps as they come out instead of taking suggestions), and it seems to be doing pretty well (too bad people aren't actually posting much feedback on the maps, though).