@Fronjotr suggested that I duplicate my suggestion here:
I’ve frequently run into issues with buildings where I will design complex top floors and then go to add a roof, but the automatic roof will only parent to a single wall and not the entire structure. I’d like the ability to draw a roof using the same method as drawing a second floor - pick the start block, and the end block, and have that define the rectangle instead of tying it to certain walls.
In addition to preventing frustrations from roofing issues, the interface change would provide a lot more flexibility in building design.
Such a tool would also imply that it would be possible to add an eraser for roof tiles, but I see that suggestion is already handled.