#1 - A global option where the Channel and Voice buttons would indicate which mode is currently selected, without having to press S first.
When I program a sound, I have no use of switching between different layers or allocating voices. Being able to always see which mode has been selected for all the encoders would be very useful. Looking up this information on the tiny screen, or by pressing S is not as easy.
Pressing S, could show the Channel/Voice allocation.