Clean Up Library should list the "deleted" files it proposes to remove

For me as a predominantly streaming user of ROON I have often looked at this screen and wondered if I should “clean my library”

If the files are removed from a streaming service, I’d like to know.

If I clean my library and the files are re-added to the service I assume I won’t get them back.
If I don’t remove them and they are re-added do they reappear in my library?
If there are a mixture of local files that I do wish to remove and streaming files that I don’t can I separate these two to allow a partially dusted library?

At the moment it’s a confusing feature that I would like to see updated.