My imperfect understanding is that if you delete (uninstall via the Content Store) a DLC route then any assets that were installed with the route will:-
be classified as Payware (not active) if the assets were also payware but they should not be removed from your system
be classified as Packaged if the assets are also available on the DLS but again they should not be removed from your system
That, at least, is the theory. There have been some "glitches" with this system in which case you are advised to make a bug report.
In the case of Payware (not active) the assets can be made "active" again by re-installing the DLC route.