@elan , so would you eventually consider competing with Roon ? looks what I described a while back in this post :
in short :
→ Plex capable to stream to rpi endpoints, and in sync to several enpoints if requested (just like Roon does using RAAT, included Eg: in Hifiberry OS)
→ Plex automatically putting alternative versions of the same album in a single album occurrence in the GUI, to avoid seeing the same album 5 times when you own several versions) + display the best quality automatically in the GUI
→ more generally, improve Plexamp to be used as a remote (just like Roon clients do) and improve the tags, create genres sections, better artists descriptions, implement lyrics, etc.
Really, I’d love to share my Roon account with you to give you an idea about what music enthusiasts expect from Plex. I’d love to see this working in Plex. Really.