All rooms come with walls, which is great except for things like the town square which shouldn't have them. An option to place a room without having walls would be really useful, especially for things like the alleys in towns
Related, have the ability to delete just one segment of a wall. perhaps it fell down, so there won't be an arch, just no wall.
If it's not too late, also toggle off windows. Underground rooms don't need them...
I can already imagine all sorts of areas with this feature
Merged with: Create a ROOM no AI where you select windows or not and wall type manually
This is coming in the next update :).