I have an idea to make things less laggy, don't know if it would work but here it is.
Have a "bake" or merge feature that would convert all placed objects or selected objects from moveable ones to basically parts of the map. This would exclude doors and intractable/physics props but would make things like canvases locked until reset. IDK if the idea would work but it should make community condos less laggy. Should also make building easier so you don't accidently move a piece that took you ages to get there.