[Nonfractal]

Steve,
Your post has taken a while to digest. 
Maybe terminology that reflects the graph would make this easier to understand (and sell) 

Climb           (attack)
Peak            (brake)
Wait / Lull   (hold)
Descend     (decay) 

I'd be interested in how these might be handled without adding knobs all over the controller. 
One of my pet hates with the slot.IT SCP is the rotary knobs that are hard to tune, easy to knock out of adjustment and impossible to adjust by touch only.

Alan