What are the chances for _Rebuild _DeleteInput=No being history enabled?
I can provide more detail on the workflows this would enable, but the TLDR is to have a lightweight srf for surface editing and have a heavyweight target surface that controls spacing better with _FlowBySrf.
Currently, I use -Loft Type=Loose Simplify=None and Simplify=Rebuild RebuildCount=XX to get two surfaces, but it doesn’t work in a lot of situations due to the RebuildCount only applying in one direction.