FullWings Great ideas which, unfortunately, have to be concisely specified in a mathematical way before they can be implemented in a control system. Maybe this process is slightly more difficult than it appears on the surface? Also, these systems have to function throughout the entire flight envelope, without bringing the law of unintended consequences into play...
I'll wager the maths have been done to death, and the engineering modelled and rejected as too expensive. Also too heavy. It is frustrating that compromises are accepted, and that training is allowed to kill. That is, assuming the Rudder was the problem. Eleven years on, is it still too soon to discuss the mechanical possibilities of damage by foul play?