The welded seams issue has a fix, its just not active in that version probably becuase it was causing problems elsewhere. But imo unwelded seams on models, and geometry stored in the prop rig file are examples of poor design choices on the part of the content creator. Unwelded seams in particular cause problems in many programs such as zbrush. Whether or not these issues ever get resolved for Poser imports really has no ultimate bearing on the abilities of D|S with its eventual native content. It was never meant to simply be a Poser format importer. Thats just a perk, like loading .obj is into a program like LW. The functionality will eventually begin to show that the two are a very different breed, both in what they do, and how. That said, a ton of effort goes into making sure everything gets translated across that makes sense to, that won't cripple the program's goals.