Fran, completely agree with you about new Tones not cutting off old ones. Even some Roland WSs don't allow this, and it ruins their effectiveness as live keyboards...
Combine it with the use of the Sostenuto pedal, and you can do some quite complex things even with just one hand...
One of my favorites... Multi-button pedalboard inputs. I can't imagine using an arranger without one...
_________________________
An arranger is just a tool. What matters is what you build with it..!