Agreed! I also have cover art added to my (individual) tracks. It’s a shame they don’t show up now.
I really love Roon already, but IMHO it’s model is too much centred around complete albums from one particular artist. That of course is a very important use case, but Roon should be able to handle collections of individual tracks better than it does at the moment.
Maybe Playlists are the best method to handle these track collections?