I like to scroll through my library and find old liked songs, from Artists that are not too well known to me, to listen to. However, there is only one way to do this currently and that is to go to 'Liked Songs' and scroll through thousands of all my liked songs, which is not practical.
The artists filter in my library will only show 'followed' artists. Now I'm sure I'm not alone when I say that I do not follow every single artist where I like a song from which makes the filter really poor when scrolling through to listen to older music and/or creating playlists. I don't just want to see all the songs I like from followed artists, I want to see ALL artists that I like a song, or songs, from.
Similar to the album filter, it only shows liked albums and not songs that have been liked from that album, so these filters are really poor unless you want to spend hours scrolling through all your Liked Songs.