Your post is a bit older, but I have a question.
Are you still using Beets and if so, do you have a special configuration for Roon? Or at best, do you have your configuration published somewhere?
I’m currently tinkering with Beets because I want to automate the import process of new files. The whole thing of course paired with a maximum of metadata, lyrics, artwork, etc.
I’m quite happy with the result of my configuration (I’m still pretty much at the beginning), but maybe there are still some interesting details.