lunar.tumblr.com used to be the blocks I'm onto lately and new lunar is intended to be the same ideas re-platformed.
the ability to add files into the library! As it stands the only way to get music into the music app on the ipad pro is to buy it in the music store or have a Mac to sync from.
The ability to drag tracks out of the app and have the mp3s land in a folder
Select and move multiple tracks around a playlist
Not having the UI stutter when deleting tracks from a playlist