Not trying to bash D/S here, but this is where the whole workflow argument falls apart for me. My goal is to reduce my workflow, not increase it.

 I can grok that... it works in my case because I never leave D|S (except to maybe LuxRender or suchlike.)  On the Poser side of things, you might be able to get away with only exporting the character once, then importing that export into Poser, then trying to get the V4 clothing on it in Poser (not really sure if that would work though - if not, you can fit the V4 clothing in D|S initially, then export the clothing as a .cr2?) Either way, you only have to do it once, in the beginning. You can then save the results for later use w/o leaving Poser.