Yep, 7,5 years later and i'm still eagerly waiting for this.

FTR, suggested here: http://www.ventismedia.com/mantis/view.php?id=5418

I would like for MM to have this ability:

When referencing a playlist as a criteria for an autoplaylist there should be an option to automatically set all nested playlists of the referenced playlists as referenced too.

Currently if i have a playlist A with nested playlists 1,2,3 I need to reference all playlists 1,2,3 if I want the songs in them to be included in/excluded from the autoplaylist. While this is certainly possible it is annoying when you need to edit the autoplaylist every time you add another playlist (4,5,6,etc.) to the referenced playlist.