What
Stands out for me, in reading the AR is how touchy the Pedals/Rudder interface is. The PIO potential, and guesswork needed by the Pilots. I also want to say I don't understand how the VS could separate before the Rudder. The Rudder is a trimming device, the VS is life itself. If at 1.96x Load Limit the whole deal sheds, then I would think the Rudder would (should) separate at some value less than 1.96. Now it could be that is the case, and separation was Composite fracture related, but that isn't what NTSB concluded relative to fracture stabilisation in less than failure condition.
Airfoil