Wall heights

I would really love to be able to change the wall height per room instead of per floor, the same way it works with foundations right now. I know there is a way around it (by using half walls and the roof trick) but that's really glitchy and just a lot of work for something that I think is achievable (it was the same way with foundations and those are now "fixed"). Hopefully this is something that's added in the future! :)