Maybe an drum track editor with drum steps sequencer with wav/aiff format drums import? Like AKAI MPC2.5, FLS… Beat Designer is very good…but it work only like plugin and only with MIDI . I think this is very cool for instant beats with wav/aiff files drums. I think it will be a BIG BIG new feature!
Or, maybe import wav/aiff in Beat Designer , every single drum with independent outputs of signal to mixer.