For updates, my thoughts were mostly about ridding the car of the many extra screw holes and bosses for mechanical speed controls and other ghosts of the past. Also, updates like a square battery slot, or opening up the rear bulkhead for easier electronics installation would be welcomed. (By me, at any rate.) the gearbox, steering setup and geometry are perfect in their imperfectness and need to be left alone.
Or...a straight continuation of the chassis with some new, affordable, hop ups would be amazing!