Steve here are mine:
(1) Dedicated Bass Inversion button on the console

(2) A new chord recognition mode that EXACTLY mirrors Roland's "Chord Intelligence." (Yamaha's AI Fingered is close but not exactly the same, and thus it's a deterrent to switching brands.)

(3) "Batching" of chord input to prevent premature triggering of unintended chords. This problem can be ameliorated by a user adjustable delay from real time up to about 60ms (0.06 seconds.) I believe Korg batches their chord note input, and the software arranger Live Styler has a user-adjustable delay window. For more details see this post:
http://www.psrtutorial.com/forum/index.php?topic=8234.msg56366#msg56366

(4) The ability to correct the chord track associated with a real-time "quick" recording, after the fact. This could be accomplished with a fuller implementation of the "Chd" tab, which I believe is currently limited to step recording. Korg models presently have this capability.

Thanks for asking! -Ted