Tried to make an acronym, but failed. My thought based upon the NASA study is, if failures could not be traced to the vehicle systems then the failure must be in the fleshy water bag behind the wheel. Given that, better training is in order.
For instance, I remember when I was about 10 my Dad installed a cruise control on our old beater station wagon. One day the chain connecting the actuator to the throttle somehow became stuck. ISTR that we we actually continuing to accelerate, as well, but that could just be a memory warped by age. In any case, my father performed a really revolutionary, non-computerized, non government-mandated action to mitigate this: he turned the ignition off. Sure, the power steering then became difficult to work, but we were able to coast off the highway and come to a stop by otherwise normal means.
I have kept that with me my entire life, and it's come in useful at least once for me: a stuck A/C open-throttle over-ride switch which prevented the throttle from returning to idle position, and another time which involved an accident and the memory is definitely warped by the situation.
Now, sudden accelerations are another point altogether, but the infrequency of those I feel do not merit a system which can not only fail and result in unintended consequences, but lend to the development of a false sense of security and a more hands-off approach to a very critical and practically dangerous activity.