I have floor reflection. Placing the structure only on the assigned type of floor is not good idea. Let it be divided in the menu, but in the game it's a stupid restriction. Very interesting visual effects could be created. But an ugly mixture of floors, necessary for creative joining of elements is a mistake.
Problem two. It would be nice for the subfloor, pit and window to become a floor, not a decoration. Nothing can be bet on it. Another stupid restriction.
And a request for plants. At the space station, a botanical garden would be a big attraction.
And here the quintessence of the problem. I have a vision of grassy floors where the plants will be mixed with bar tables, pools, fountains, sculptures, artifacts and more. Unfortunately, most object glued to specific type of floor.