And to draw some kind of conclusions from the discussion here.

I think it's been made clear through this discourse that the answer to the OP's question does "Poser 11 improve DAZ product handling?" Is an emphatic No and the reason is clearly that Poser or SM has no interest in building their product to facilitate a 3rd party Content Market whether from Daz3D or from independent creators. And I wouldn't expect this position to change in the foreseeable future. Which may mean if you value 3rd party content, or in turn 3rd party markets, Poser may not be the best choice for you as an individual consumer. If you want an enclosed platform that gives you powerful tools to do a wealth of cool things with it's included product content or merchant resources, then it may be something you would enjoy and I'm sure it will aid you in creating some wonderful art or even tinkering out a Genestein if that's what you enjoy. ;)

As far as the rest of my commentary on the subject feel free to listen or discard at your leisure. But sincerely it wasn't made from a destructive or malicious viewpoint just my honest opinions based on the facts I have available to me and my own past experiences.