1: Cross section display

Something that'd show the cross section of the craft at any given point along its length (or other dimension). This should take into account corner type, which I really would like to actually be a real thing beyond visuals.
Would be very useful for the area rule and making realistic supersonic craft.

2: Vehicle Volume

I believe this exists to some extent in-game, though only visible through dev console when spawning a large craft. However, I'm given no reason to believe it takes into account rounded fuselage corners, and have no idea what it does and does not count. Overlapping parts? Engines and landing gear?
This would be very useful for making realistic ships, as it could be used to work out the actual displacement of the design created, rather than having to go through mathematical hell to work out what the block coefficient of my ship is.

I might add more if they come to mind.