The new musicbrainz/allmusic agent is great for more mainstream artists, but alot of underground DIY artists who would previously match on last.fm (which is more DIY friendly) now seem to have their similar artist/top tracks info overridden as the metadata refreshes, to the least sparsely populated musicbrainz -> allmusic database.
I’d love to be able to choose the option to fall back on last.fm to fill in any null or empty fields after the musicbrainz search, or better yet, to have the musicbrainz agent use the last.fm link in the relationship field to populate event, top track and similar artists fields as these are generally more realistic representation than allmusic’s choices