As a keyboard player I would just like to have a more direct approach to harmonic changes... so please add real-time chord input to the Chord Track to adapt tracks to follow chords changes on the fly. This could be used for live performance (especially if quantized triggering of Arranger Track sections is also added) and also to record chord progression while playing them rather than drawing them in. Chord recognition is already implemented in Studio One, thus it shouldn't be much of a problem to add this feature.
See HarmoTools for Ableton Live as an example.