Ages ago I submitted something along these lines to the wish list, but when I came to see what the response was like, it appears disabled. So:
MJ introduced me to the excellent feature of having an "album artist" tag. (Yes, I know you can have arbitrary tags in APE files, but program support helps a lot.) It's indispensable -- by convention I stick the composer into Artist and the performer(s) into Album Artist. I imagine collectors of electronica have devised similar schemes for dealing with samples, ditto a cappella fans for keeping track of covered songs, etc...
Problem is, MJ only supports it half-way. The main display (or visualization, whatever the term is now) omits it. You can't search for it. When you drill down in the Media Library, it gets jumbled with ordinary Artist info. Is there a workaround available or update possible?
I've been a registered MJ user for many years. Tell me that MC has full support here and I may just be tempted...