[David55]

*Gyroscope - I understand that one can be connected to the microcontroller with some custom wiring and programming, but i think it would be more convenient for the people starting with robotics to have a compatible vex gyroscope.

*Camera - I heard this could also be done with some hardware and software hacking but on a more advanced level. A compatible vex camera (CMU or any other) would really expand the autonomous capabilities of the vex robots.

*sound sensor - for sound activation, like the one in the mindstorms NXT kit.

*Wider variety of motors

*Upgraded remote control, or even some type of operator interface so more advanced users can make their own controls.

*cheaper vex pneumatics kits.

I think the vex kits are great already, but the above accessories will really give it an advantage over the other kits.