Sven Molin's feet allegedly performing a Tour de France sprint seem to be the focus of many posts in this new thread; and coupled with the paper-thin margins between breakout force and full deflection, and control system lags, they may eventually be demonstrated as the initiating cause.
So far I have not seen anything in this or previous threads or available NTSB documents to exculpate the yaw damper and/or rudder control system.
I'm waiting for Airbus to hire a 747 to generate a similar wake and fly the accident profile in a well-instrumented A300-600 -- flight test crew may insist on bang seats