Only partially agree, Dave. In my opinion (as an organ player), the Expression Pedal and touch sensitivity on the keyboard are two totally different things. The expression pedal is going to affect every note that's active while a 'touch sensitive' keyboard is going to affect each note individually. That's why, in my opinion, they can't be used interchangeably. I wouldn't want to play 'organ' on ANY keyboard without an expression pedal (and touch sensitivity OFF - if that's possible). Likewise I wouldn't want to have to try to control 'expressiveness' on a piano with an expression pedal. Apples and pears.

chas