When a CAD user creates an automatic share from a library by accessing the library part from Creo (browse, insert), only the CAD document is shared. Once this is done, the CAD user has to go to each individual file they added to their model and find the WTpart in Windchill, and share just the WTpart. If they don't, they cannot check in the part to Widnchill, because Windchill cannot build the product (wtpart) structure. This limits the use of product structures in a project context.
What I am suggesting is a Windchill preference that allows windchill to automatically share the associated wtpart of the CAD model added on the the fly (either add to workspace, or open in a project workspace).