Some restrictions..

You said that we can't vote the same event twice.. but when we have to vote for events we still see all events in our list.. make the event who was before to dissapear for the next time.

Put some restrictions on maps.. like you did in godard by puting trees.

Add more places like monastery and make them apear time by time... one melee map one ranged! Because we see so many ranged maps and monastery is the only melee map who every class can dealt dmg without making KM/H to get to his target!

You can vote but same event will not be selected two times in row.
Adding tress in all maps is time wasting and what is the point of that?
If you can offer any particular zone for new map than do it.

OK but you can make some maps that you already have for melee by putting only trees.