Is there any way to exclude Roon favorites from a Focus search?
I want to shuffle music I haven’t already marked as a Favorite in Roon so that I can find more favorites. Or new stuff to ban. 
I’m not sure if there’s a direct way. But what you could do is filtering for favourite tracks (or albums) and then add a tag to those. Afterwards you’d have a tag which you can invert for focussing. Maybe Inspector should also get a “Heart” option - would be a feature request.