Currently we are using votebans on zCatch and I think this might highly help vanilla and every derived mod.
It's a "simple" means of preventing people from abusing the kick vote system without kicking or banning them, while keeping the number of players constant on a server.
A constant number of players will also keep other players playing the game happily, as servers might not get too empty due to trolls and what not being constantly banned.
The whole concept only introduces admin com...
I got a few ideas to improve the editor and to prevent some common mapping bugs:
Repeat button: Maps automatically repeat themselfs on edges. Make a button to do this in the editor, too. E.G. you see deathtiles repeated endlessly, doodads like trees, bushes, bones in grass_main, etc.
Low Detail button: Automatically hide all detail layers (and show non-detail layers) so you don't have to do it by hand. A lot of people play on High Detailsdisabled.