Hi!
My Feature Suggestion for Plexamp (and Plex music management in general) is for Playlists:
Ability to select and mass-edit songs in already existing playlists e.g. select 5-10-100 songs in a playlist and then move them to another one, set Star rating on all of them, etc.;
If we can also get a Sort option of “date added to playlist”, that would be great as well.