I would like to suggest a feature to automatically play Arranger parts according to a playlist. So you can arrange the way arranger parts play simply by reordering the playlist and without the need to physically move, duplicate or remove items on the timeline. For instance when you want to try out how a different progression sounds or how it sounds when you double the chorus, put a sketch in residing in scratch pad, or you just want to try out how the song sounds without a certain part.
It would be nice if there is an option to loop parts for a X amount of time. And also visual representation of Arranger parts residing in the Scratch pad. Also would it be sweet if Arranger parts in the playlist can be disabled (muted), so they will be skipped on playback.
Finally it would be very cool if the Arranger playlist can be freezed, so the entire playlist structure is parsed as arrangement to the timeline of the current song, or a new song. This is very useful if you want to use the Arranger track as a creative tool.
Additionally an option to export the Arranger playlist from the Export Mixdown dialogue as Export range would finish it.
Not really a priority, but being able to create several Arranger playlists for the same song, would be nice.
As an extra low priority option I would like to suggest a feature to trigger Arranger parts in the playlist by MIDI input.
An example of an Arranger Playlist:
Case study (Cubase Arranger Chain)
This is an example of Cubase's Arranger Chain playing 4 Arranger Parts according to an Arranger Chain, with overlaps and loop.