One thing to remember on FBW is that the control surfaces are doing their own thing trying to keep the airframe in it's last commanded position. Hence what you see may not be pilot actions. PIO is often the result of over controlling & not letting the gizmos do their job. The human is often correcting just as the gizmo corrects so over control results. Not sure of the logic blend on the 380. But once on the ground things tend to get conventional with some surprises. e.g. A320 halving the aileron deflection on touch down. My experience is A320/1 & A330.