In answer to my question: "What features did you find desirable?".
[]number of real-time controllers. Having nine sliders and two foot pedals certainly facilitates this.
[]edit waves graphically.

If CASIO took our advice seriously, would we prefer more controllability (& thus utilize our MIDI equipment & computers) over better sound generation?

For those who wish to contact someone at CASIO who answers email: "Alstrom, Ed"