With the digital envelopes available on many of the new Moog synthesizers, I would love if the ADSR contours could be altered within the software editor. Adjusting between linear and exponential shapes would make for quite a variety of percussive sounds. With the Dave Smith line this can be done by having the envelope stages modulate themselves; the modulation bends the otherwise linear ADSR control voltages. I would be very excited if I could do something similar with my Minitaur. This all started when I compared the decay of the Werkstatt to the Minitaur and the Mother-32. The Werkstatt has a pleasing curved decay/release that I prefer to the others.
You don’t just have to feature this in an Editor, it needs to included in the firmware of the synth first.
That is correct, and I bet the Moog engineers will understand that. 
Just a couple of weeks ago I discovered the gate/envelope function in the MP-201 Multi Pedal. Each stage of the ADSR can be set for linear, exponential or log. Sending a 1 shot envelope initiated (and terminated) by a foot switch is way cool.