Machinbird
It has indeed been a fascinating discussion but I would still question the involvement of PIO in this case. The sageburner accident is indeed interesting but is it relevant? A high speed jet fighter going for a low altitude speed record? You are almost certainly more conversant with the design philosophy of the F4 than me but I would have thought that it was designed to be very responsive to control inputs - more so than a civilian airliner. Maybe for the pilot to have stopped the control inputs would have helped but once again I suspect you would be more knowledgeable on this point. However, PIO seems to be a phenomenon which affects small manoeuverable aircraft more than civil airliners (referencing the database in the Aristotel article). But even so with a small fast manoeuverable machine it is often better to 'let go and hold back'. I fully acknowledge your point that sometimes you have to act quickly but for most cases this would not be my approach.
OK465, I think, hits the nail on the head. The A330 is not a machine designed to be flung around. It is rather an aircraft designed to fly in a stable manner. Leaving the aircraft alone was the correct approach in this case - it would not have remained in its unstable state. A light touch on the controls if it threatened to roll too far but the roll amplitude was not excessive or too radical. PJ2 who commented on the incident in I believe the third thread of this subject advocated this approach and I would bow to his knowledge. I still find myself coming back to the crew behaviour in this accident. The complete lack of CRM cannot be disregarded and this is a more significant factor than any supposed PIO (and we must be honest we have no evidence of PIO in this accident - we have hypothesis but that is all). Remember in your experience in the simulator you were able to overcome PIO by use of your instruments (and I would assume a pause but do correct me if I am wrong). The PF in this case did not pause (a cavalry charge as you say) and does not seem to have had a scan and crucially to have ignored his copilot. This is the crux of the matter - a seeming panic reaction by both the flight crew.