Faction Base

I think this is a gold mine right here.

Since we have the editor, we can allow absolutely everyone to design their own faction bases.

Quests for guildmates, custom mob arenas

+ potentially custom walls (not sure yet how to do it programatically, but it's definitely possible)

It would work same as current guild bases. Terrain is the same for everyone, but there are different NPCs basing on your guild level and you can find different people in different faction bases.

I haven't tried, but I'm guessing you can spawn monsters in any faction base (with GM commands), so you should be just as well able to spawn dynamic objects like gates seen in dungeons that disappear after some mob is killed). Same goes for NPCs, I hope.

So the map for faction base is accessible, but you can enter it even without being in any faction and there are no npcs there.

Faction bases will require some engineering, but they're still something I'll be going for.