Software that would enable a 2D view of each component in the regular components folders - plan view and elevation, so that you can just drop them into layout.
Or simply a more simple 2D component set made by Google for 2D use, ie tables and chairs with various seat numbers/table lengths, structure, (steels etc) services - HVAC etc.
Would be very simple to implement I think.
Why not actually make Layout of some use - as a 2D drafting package, esp for architects / interior designers.