Similar Artist Radio
What is the problem you are facing?
My favorite random mode when using desktop clients Amarok or Cantata are the "Similar Artist" mode. I don't know if they get their info from last.fm or MusicBrainz, but they are reasonably accurate on pairing up artists that go together. The overall experience is that of a Pandora radio station based on an artist.
What are the possible drawbacks or issues with the requested changes?
Biggest drawback would be - where is this data coming from? Would they be OK with FunkWhale accessing it? What if they change or eliminate their API?