I've been curious for a pretty long time as to why this isn't in the game yet, so I decided to request this feature. When I download beatmap packs, I get a lot of 1/2/3/4 star maps and the like, and I have no need for them. However, in order to delete them, I have to delete them one-by-one, which can take quite a lot of time if there are a few thousand beatmaps. I think this should be a simple(?) but nice addition to the game, and would make people's lives a lot easier. Basically, all that is needed here is the same system as the "Song Select" in the "Gameplay" menu, but with a delete function added.
/There is already a way to do this that I wasn't aware of, so this post is pretty much invalid/
/There is already a way to do this that I wasn't aware of, so this post is pretty much invalid/