I am an unusual SC3 user, so I don’t expect to be satisfied 
Nevertheless I think that, considered the huge complexity of the new GUI, and the fact that you can do similar things in different areas, but moving chords from those areas is not always possiblle, I think that shortcuts, or even better a customizable top area, could be usfeul for “standard” users
For example, while auditing chords with the Keys Lock feature, I often need to toggle the Keys Lock Chord Mute button, and also che DAW sync button, but those items are several clicks away, so a pain in the ass
Below is one possible area to put the Keys Lock toggle
Now, I suspect that making the GUI customizable is very complex for devs, but I hope that adding shortcuts is doable