(Suggestion) More QoL Functions

[NutritiousCookie]

I currently use Smarter Playlists to manage some auto-generated playlists, which although much more feature-complete is getting rather old and clunky.

I use auto playlists to manage my library and tell me what songs I have saved, but not organized to genre or mood playlists. To do this, I add my entire library, then subtract everything from those playlists.

The two features from Smarter playlists I'd like to see in Combined Playlists before the app would be useful for me would be the De-dup and Subtract functions. They would both be useful outside this context as well, allowing users to blacklist songs and prevent repeating songs.