I think that Novak needs to step up to a larger diameter rotor (14mm would be doable with the current motor design IIRC) and more than a 2 pole magnet so that the motors can produce the torque that a feigao or other larger diameter rotored motors produce. At the very least, more poles and a larger rotor will probably help efficiency a little too.

It'd be nice if they completely re-did the motors and ESC though.