Its something to do with skinning cats 
Album by Composer from a Classical view point is not an excessive request.
Yes you can Focus then Bookmark but then you get a mess of Bookmarks to manage which is equally messy.
Using Roon is like any other software , it does it its own way and you either work around it, request a feature or give up. I personally keep JRiver up to date as I can define what I see on the screen and find it infinitely better than Roon for navigation
I used to choose by
Composer>Genre>Album because I had that view set up in my legacy system
Now I have ābeen trainedā to ā¦
Albums>Filter by Composer > Select album (Still messy)
Or
Albums>Filter Artist select album
Neither are perfect , Composition is good my cluttered (my library has the DG Boxes for complete works of Bach, Beethoven, Mozart, Brahms and Chopin hence Composition shows 1300 Bach compositions )
Donāt get me started on Box Sets (I gave up and use JRiver where I can control the view). This is a MAJOR shortfall for any Classical (and Jazz I believe) Collector. It is still the cheapest way to collect recordings
Roon and JRiver do 2 very different jobs so I use BOTH , depending on what I am doing.
Rant Over