One of the things that is missing is a listing of the various elements placed on a floor underneath the floor plan for each floor in the Navigator Panel. Many times selecting an item is difficult or sometimes impossible when in the floor plan view as most items are selected at their edges and not at the body of the item. As an example, the floor slab is at the bottom and there could many items directly above it but if you don't position the cursor at just the right spot tabbing through the list might not show the slab. My suggestion is to either allow item selection from within the body of the item or provide a listing of each item in the Navigator panel. These selection issues hold true in the 3D view as well. Try selecting a slab in the 3D view by hovering the cursor over the center of it, won't happen.
regards