Still, it would be awesome if it would be able to designate 2d and 3d layering seperately, or to hide certain objects in 2d or make them transparent.

For example: My living room has a part of ceiling that is lower than the rest. I can draw it by making a box hanging down from the ceiling, but it clogs up the 2d view; it's more part of the floor plan, and not furniture.

I know it sounds a bit far fetched and not a big deal... On the other hand, it would just be an extra parameter and it would allow you to do some nice things.