That's one of the reasons I sold the Audya years ago; I had to reach too far for the wheels, and I much prefer joystick anyway.  It would be a deal-killer for me. 
I understand your concerns Don but who knows maybe the new SD10 when ever that is  will be a different design for ketron excluding mod wheels and having a joystick for sure. or use a sd90 module and controller of your choice with joystick,.
btw do you have any Audya recording we can hear from the past?