Sorry for taking THIS long to respond but yeah, something like that, in the case of a favorites tab, I was thinking of what the Samsung music player has where the favorites tab includes; playlists, albums, artists and "favorite singles", the attached picture has the gist of it.
In the case of the custom ordered playlists and etc., I meant that within each category, you could manually reorganize the (ie.) playlists in whatever order you want, or in the case of the albums, you can simply move the albums around without having to filter them by artist name or tracks.