It took a while but it seems that they implemented processing the MusicBrainz release group information (Tag support for ROBUST music library organization - #75 by beckfield). Now, fingers crossed that they allow to set this field manually and from tags ([How-To] Album Types and Editing MusicBrainz - #10 by SimonXCIV)…
Anyways, also vouching for this feature, not only for proper tag support but also to process and handle the tags properly (like: support multiple artists per track and not having them grouped with the seperator (artist1 & artist2), Better support for albums and tracks with multiple artists).
With all the great music improvements over the past years, I have a bit more hope that music gets more priority.
