I realy like using velocity and key tracking alot while playing or recording from my midi keyboard, and some times i use some efects as a velocity, but they work in monophonic way, wel it’s not bad, especialy for basslines but when it comes to some pads or ployphonic melodies with note tails overlaping each other the you can hear, that effect is changing value to all the sound on each new pressed note, so the point would be: why not to implement into the effects a polyhony mode witch could be enabled when you needed it so that after each new note the previous value for the note remained the same and for the new note it would be new value while not changing previous note, something like filters on real synths or some oher software samplers…
I hope i explained it clearly…
p.s. i know that this is changing the whole architecture of the effects and would work easier inside the instrument editor…