Music migration to MacMini - Cleanup questions

Hi for context - just moved my music library from iMac (BigSur 11.7) to M4 MacMini (Sequoia 15.1.1). Didn't use Migration Asst, copied from backup drive. Launched the musiclibrary, Updated Cloud Library and ran Get Album Artwork as a lot of art went missing for some reason. Everything looks fine so far with one issue on HLS Media files (see below). My folder structure is outdated I think, my music is in /<home>/Music/iTunes/iTunes Music folder, with Apple Music and Music directories and a bunch of other junk (Podcasts, Movies etc); the musiclibrary file is in /<home>/Music and the Media subdirectory there is empty.

Questions:

1. HLS Media files from Apple Music downloads won't play, Music just does nothing. If I remove the download then it plays from the cloud OK. I can just remove downloads on anything like this case by case (and see Q2 - these files are huge) to resolve this, but wondering what the issue is
2. Is there a smart way to optimize/cull Apple Music downloads en masse or based on # plays - I have grown to 135GB of downloaded Apple Music vs. 80GB local music I "own" (purchased/imported) - and that 135GB is included in my local and cloud backups. The main reason to download is to listen on phone without wifi to avoid issues with cellular data. I had automatic downloads enabled on the iMac, so far have turned this off on MacMini. Wondering about dumping a lot of this and figure out what I really need downloaded.
3. I believe all this data should be under the Media folder but not sure the structure, and the Organize Library/Consolidation function should take care of reorganizing this cleanly in the latest structure. But when I run it, it shows a brief dialog box and seems to do nothing. What to do - anywhere I can look to see what it did or why it did nothing and unblock it, or move the data into the right structure manually?