Yes, I also would guess, as long as you plan to use the high res morphs in Poser and only on that SubD level its fine. Possibly they cannot be converted to DAZ and might break when you reload the figure with another SubD level, but that requirement could depend on the use case, just like the wish for more polys in the beginning. Autofit of cloth is another question. Does poser Auto-Fit realtime or is it all pre-generated morph targets that come out of the import tool? Thinking of it, the import tool might read all active morph data out of the current figure/or genesis sources and then apply its projection magic upfront, so the cloth is after import just a normal (generated) cloth that contains (generated) morph targets slaved to the genesis figure with common poser technology.