+1 in a way...
I actually was thinking of a way to maybe add a field that you can customize and change so it matches last.fm tags, because you don't always want to use last.fm's versions of things.
I listen to a lot of K-pop, so tagging in Korean would mess up my alphabetical order. Sometimes last.fm will change, say, BTS to "방탄소년단," and it would be nice to say to Musicbee, "Hey, this artist is 방탄소년단 on last.fm!"
It would also help with the artist pictures and track information.