It would be nice to be able to add estimated feet up the wall and down the wall to the shape data that would add to the total footage. Practical examples would be:
Distance from 18" AFF wall plate to ceiling, then across the ceiling (normal), then down the wall to a floor standing rack.
IDF if on 1st floor, but services devices above it on the second floor. so adding the distance between floors would be helpful.
Very high ceiling environments where the IDF might be on level 1 and have a standard 42-space rack, but services devices ouside the IDF on a 40 foot ceiling in a warehouse.