I don't understand why this isn't already in the draft tool, but often a part will have a parting plane or line (or / ideally, a curve on the surface though I know that's a lot to ask) from which the mold will separate.
Draft should support drafting from that.
Currently I have to split a body / component, draft from that splitting tool, and re-combine which is needlessly many steps and more importantly is causing F350 to hang.