Dialing back the sublevel division in the figure does not hurt the morph. But I have no idea of a saved single morph would work with another sublevel (although I think it might)

Autofit is automatic (usually, not always) with the dialled morphs in the genesis figure. If you disl in new morphs, you have to apply a script (Transfer active morphs). This will load all the necessary morphs into ALL the clothing and hair and autofit it. This happens in 1-2 seconds, so it is pretty fast. It works pretty good and better as a lot of conformiing items for V4