What AK does for the song as a whole, EZdrummer does for the drums, like so:
What you see above is saveable and loadable in EZdrummer, and is stored on disk as a relatively simple text file.
… etc.
If AK could import and export such files, it would be a huge timesaver when working to realize an actual composition (with drums).
No more drudge work recreating a song structure definition by hand in more than one place. Structural interop has to start somewhere!
The same idea could apply when using Jamstix4, which also has a simple text file structure for arrangement definitions.