The mantra that group decisions are better than those of individuals is not true when you cast your 'vote' on the joystick of an Airbus. This crash highlights, as did AF447, that the lack of back drive to the other pilot's joystick is a critical failure in the Airbus design. The 23,500 hr PIC of AirAsia made some forward stick attempts at recovery; however, they were defeated by the aft stick input of the stricken SIC. The Priority button is only any use if you are aware in the first place that the other pilot is making stick inputs. Difficult to visually monitor what the other pilot is doing when you are plummeting earthwards at 40degree alpha and 12,000 fpm.