Using the ADSR front panel control for fm envelopes would be incredibly useful and make FM editing much quicker and more enjoyable.
Not sure how best to implement this as you still need them, I think it should default to using them in FM mode but have an option to change back to AMP and Filter1, Filter2, etc
The bottom front panel ADSR controls could control the extra controls, Level1, Decay2 maybe?
kb37 
mod1 
dvca1 
cmp1 
nw1 
Streichfett 
STVC 
Kyra 
Blofeld 
Blofeld Keyboard 
Pulse 2 
Quantum 
Iridium Keyboard 
Iridium 
M 
Nave iOS 
Nave Plugin 
Largo 
Waldorf Edition 2 
Attack iOS 
PPG Wave 3.v 
Lector 