1. A footswitch idea: Create a buildable footswitch solution. Interlocking footswitches that plug into a 10 input footswitch controller made specifically for the Tyros II and other new Yamaha keyboards. This would be much better for most people than the unweildy MFC-10. Some people might need 4 footswitches and no pedals. Others might want 3 pedals and two footswitches. Interlocking footswitches and pedals that can be plugged into a controller unit would solve everything.
2. The inexpensive Casio PX series of keyboards shows that a decent piano feel can be achieved without much weight and without much price. I think that the techology that's in the CVP-309 piano would cost too much and weigh too much.
3. How about a fingering mode for acoustic guitar voices where four or more keys on the keybed are dedicated to 1) full strum up, 2) full strum down, 3) partial strum up, and 4) partial strum down. The chord of the strum would be determined by left hand fingering. The speed of the strum would be determined by the tempo of the style being played.
4. Input for wind controller is a great idea.
5. Software to get into nitty gritty tweaking of voices would be fun. Make this compatible with popular sequencing softwares.
6. Real time groove control and real time style assembly
7. In style assembly, the ability to choose more than one part and/or more than one section to be assigned to another style.
8. A screen designed by Yamaha (or another manufacturer) that would rest on the music rest that would plug into the keyboard and could access lyrics and sheet music stored on a hard drive or SD card.
9. Ability to link MFD entries to registrations and not just styles.
10. Lightweight but good sounding speakers like those on the PSR3000.
Just some thoughts.
Beakybird