I'm not sure if this has been suggested yet:
Just like the OCTAVE LOCK, I would appreciate having the option to lock single arpeggiators to the Root Note/Chord/Scale to the chosen basic setting.
So that not all of the arpeggiators necesarily have to follow a change in the Root Note/Chord/Scale.
That would open up possibilities for very interessting musical results.
Under the NOTE button there are Note Lock and Scale Lock parameters that will do just this. Really handy for many different effects, drones, percussion, sampler Sounds, etc.