Not sure what tanked for you @ iTunes 11 - but I have not really found anything better than iTunes for meta data and organizing my music files, classical or other wise - Music App in Catalina is the same for meta data
You can toggle the song name to work name and movement info etc - and comments are always useful
For a while I stupidly changed the dates to the date composed - ie "Symphony No. 9 in D minor, Op. 125 Presto-Allegro" = year 1822
but that messed up my library and could not figure out the artisits and CD dates etc
Classical is more complicated