Great suggestion. Additionally, I would like to say that the "Length" measurement for parts needs to be available/visible for ALL parts whose host objects have a length.
I use Revit Parts to divide continuous footings/Concrete curbs into parts for tracking work in place, which isn't do-able without these divisions. When I divide these objects up, the only quantifiable measure that remains is CY or Height...
I am literally having to check the measurement of each part myself and enter in the length value as a Comment so that i will be able to use it in Assemble for tracking purposes, but it is a tedious and time-consuming process.
Please, PLEASE, consider making this QOL improvement for Parts. Surely the amount of coding to fix this issue is minimal.