A few more modulation destinations would be cool. Here are some in order of importance:
1) Filter envelope 'send' knob (basically the envelope amount). This one would be cool as a mod destination so we could link Velocity and Keyboard scaling to it.
2) The 'Speed' control of the HCM synthesis of each oscillator.
3) Unison 'Spread' control
4) Envelopes A, D, S and R controls
This would make the synth a whole lot more capable of dynamic playing and interesting sound design.
