Looks like I'll be downgrading MacOS
grrrr.... my love for apple is diminished!
So I've not yet experimented with this yet as I've been doing a huge amount of catchup on other stuff but one thought was.. can it be done via AppleScript? Dougscripts has loads of scripts that are currently being re-written for the Music app, and while Indigo 7.4 deprecates AppleScripts internally it can still run them externally I believe.. so would it be possible to run something from here https://dougscripts.com/itunes/scripts/scripts02.php
as a few actions in Indigo? The old iTunes plugin was pretty limited in what it could do.. I'm wondering if this may be a more flexible option?
Also FWIW my experience with Catalina on my server has so far actually been better than Mojave. A lot of odd USB issues I was having with things like my label printer, UPSes, my RFXCOM and Z-Stick have been fixed, I actually prefer the separation of music and tv apps (my movie db in iTunes is about 16tb which meant every time I search for a song it took a LOOOOONNNNGGGG time) and generally things feel more polished. That's not to say it's perfect.. I've had weird random lockup issues and it took some fiddling to get my ancient drobopro to play nicely with it all.. but on the whole I've found it better than the previous few releases.
I'm hoping next year apple does a snow-leopard kinda release.. massive work on fixing legacy issues, improving efficiency, etc rather than throwing new features at it. Although that said I'm hoping for the shortcuts app to officially come to macOS.. (preferably with some integration with native Mac apps)