Rooms, while not a major mechanic, are important. /debug rooms hi/unhi is an extremely underwhelming tool, especially with complicated builds. It would be nice if it could show where (which block(s) specifically) is causing the problem rather than just highlighting the entire room red or green. Additionally it would be helpful if it could tell you what a room is missing given what room you would like to make it. For example if you wanted a room to be a greenhouse but didn't have a glass roof it could tell you that's what your missing, etc.
