[Xonic]

I would like to see a "Play next" & "Add To Playlist" functions in Music instead of the "Queue Item" as it is now. It would vastly improve playlist functionality imho.

[mandark]

i would also greatly appreciate further functionality regarding playlists in Kodi. the current implementation is rather bare-bone.

[DarkHelmet]

There is an addon to add a song to a saved playlist, it puts the song at the end of the playlist (and editing a playlist to move that song to a different position is quite a hassle in the playlist editor)

https://forum.kodi.tv/showthread.php?tid=257334

Play next is not available as far as i know