I think it would be quite useful to show the new(-ish) genre relationships in more places, including the box for adding new tags. this could also help determine the correct genre where there's multiple similarly-named genres (like Afrobeat and Afrobeats in particular, though there's already disambiguations there). could be good to include the roots of fusion genres, like Metalcore or Disco Polo, as two random examples

an example from Rate Your Music's genre voting page might give a good idea what I've got in mind