Hi JP,
Roon 1.1 has metadata preferences for groups of albums.
From View by Album, Ctrl-A will select all albums in the library. You can use Focus to define a smaller selection.
Edit/Metadata Preference/Artwork/Prefer File and you’re done.
I don’t think this will affect future imports, however, and a “make default” option for the metadata preferences sounds like a great idea.
You can now edit Artist image in the Artist Editor. From Artist click the pencil in the lower right. Genre Editor doesn’t have an option for editing the image, so that could be a welcome addition. Not sure how a default location would work for Artist or Genre.
Support for additional artwork, liner notes etc. and a default location for finding them would be very cool.