I have finally had time to test out the ceilings and I love this update. For modern homes, I don't mind the white ceiling but older semi-historical buildings really needed this.
About a month ago I built a wizard tower and I intentionally took pictures without showing any ceiling but not I finally don't have to worry about that anymore.
https://i.imgur.com/3M0efB0.png
https://i.imgur.com/KiFthWD.png
Here is a bar that is part of my magic shop lot. It looks so much better.
https://i.imgur.com/kTYZvmh.png
Even the basement with the cards table where sims can win or loose money over a game of poker sabaac finally looks like it should.
https://i.imgur.com/l9Nj0Ua.png
I am also thrilled to be able to go into free camera mode while in build mode. No I can change the camera like I want to without loosing the option to undo changes.
@netney52 the ceiling worked for my basement. With and without a room above the basement. Make sure to have your walls up to see the ceiling. Having the walls half up only shows a black surface where the ceiling should be.