Arpeggiator doesn't arpeggiate the notes of a chord when in the Chord mode. Instead it just plays all the chord note simultaneously on each step. It is kind of strange.
Also the I would really like an option to disable/change the current indication of the octave buttons (the blinking is kind of distracting). Not sure if it is possible to implement in the firmware part but instead of blinking I would prefer the behaviour when the brightness of the button would increase gradually on every octave shift step.