Better Handling of Product Changes with Visio

I have run into several instances with SI recently where a project has changed due to CO or value engineering changes. Because drawings for submittal/approval were already done, this created an interesting wrinkle that I suspect is due to the project database being separate from the drawing file. I can only confirm this with Visio at the moment. It would be nice to have the option to remove and or reassign any products that have been changed or added when opening external changes have been made.

** Option being the key word. Currently SI just removes them from the drawings with no notice.