I'd love to see better PDF tagging. Then I could use JRiver to tag sheet music and pair sheet music, chord charts, and scores with recordings.
YES! This is another area where MC is tantalizingly close (perhaps unintended). Those of us who use music "on paper" would love to use MC for this, as we do (or should do) with our many audio files. I have a huge (and growing) sheet music library, as does every musician I know, and no one has a really good way to manage it all.
Most musicians now use music reader apps on Android (Mobile Sheets Pro is my fave) or IOS on tablets (or even phones) to display the sheet music PDFs. These apps provide a tad of PDF organization. But using a small touch screen with these special-purpose apps is impractical for truly managing hundreds (or my thousands) of PDFs.
The main MC needs for performing musicians:
-- click-to-view-PDF (likely via a PDF viewer separately installed, there are many, mostly free)
-- tagging PDFs with a set of suitable fields (the various music reader apps have this pinned down, just do the same)
-- storing the tags in PDFs so the other apps can read them, which most do, assuming the "common" tags are used
There are other capabilities that would be cool, such as sync with a specified tablet folder, but that can be done other ways.
PS: MC could be the solution for many PDF management needs beyond sheet music. Any lawyers or business people or educators or other humans in the MC customer zone?