Sloped ceiling to remain consistent while adding walls

It would be so nice if we could create a sloped ceiling to an entire space then add walls without the ceiling changing. Currently, the program forces you to customize a ceiling (and the wall height!) as you add walls within a space. This makes it so time consuming to do the calculations to get the right pitch within each “room” to get the overall ceiling to be accurate and angled correctly.

To piggy back- it’d be awesome to set a ceiling height to a floor plan so we don’t have to keep changing it as we build in walls. Currently the default height is 96” as you add walls to a project.

Video attached. Here you can see that I added walls after I made my overall sloped ceiling thinking I’d save myself time. Nope! It also creates strange white lines in floor plan view.

Thanks!