I think a good feature to add might be the ability to hide certain artist recommendations. lemme give you a personal example...

for the past two years now, I've gotten recommendations for new albums from Pink Floyd. they're not one of my top bands, but I kinda like Pink Floyd. that said, 5 of my top 10 album recommendations are newly released albums, mostly live albums. I don't want to have to weed through 20-30 Pink Floyd albums (all new releases this year, apparently) to find the music I'm gonna be really into, like Snail's House and Spott

I see two possible solutions here (and both can work together, if desired)

1. hide or filter artist recommendations manually. say you go to an artist page and there's a little dropdown with some options, like "Only recommend major releases", "Recommend all releases", and "Stop recommending this artist to me" or something like that, which can tweak what releases by each artist show up in the various places releases are recommended, Fresh Releases, Year in Music, and future places too
2. limit the number of releases from a single artist. perhaps set an upper limit of like, 5-10 releases per artist (or something like 7% or so), that way one prolific artist doesn't take over your whole recommendation page

there's possibly other solutions, but those are my thoughts on this~