Hi Pen! I had originally learned from Mec4D that there were some advantages in starting in DS and then moving to Poser. Over time, I have learned that there are indeed some advantages, but it depends on what is being converted. For example, the Western Outfit for Dusk worked terribly going from DS to Poser. The grouping was unusable, and the morphs were mostly mangled. It didn't handle the bulging groups correctly, and many weight maps didn't connect to the right groups. I couldn't reuse anything, and had to start over in Poser.
As it stands, there were only a few projects where things actually went well from DS to Poser. The "Adventurer" for Dusk was originally created for DS, but once exported to Poser, the rigging suffered terribly, and was not usable at all. Several weight maps were missing in adjacent body groups, making the rigging impossible. I suspect this happens because the CR2 Exporter plugin was created before weight maps existed, so there are many cases where it doesn't handle them correctly.
Therefore to claim that the DS to Poser pipeline is the best is only half true. It's good when it works, and bad in all other cases. As for Poser to DS, this issue with unhooked ERCs seems to be an old issue, related to the way ERCs are handled in both programs. Whenever I have converted a Poser figure to TriAx, all ERCs with master dials for dependent params get disconnected. They are not lost, but instead just unhooked. I don't know enough of the DS internals to know how to hook them back. Paul has showed me once, but I left with my head spinning. LOL