Each side-stick is clearly visible from the opposite seat, therefore the excuse that the PNF was in the dark about what the PF was doing is false. They saw what the stick input was and agreed with the action taken, apparently. Not that it would have made much difference getting the nose down, even assuming the stick was held against the forward stops (which it wasn't). At an approx. -63 degree FPA ... combined with a markedly positive deck angle of 10 degrees NU or more, the THS was fully stalled (dropping at twice the rate of forward airspeed yields the -63 degree value for FPA [inverse tangent (2/1)] ).
Since the plane wasn't flying anymore, the situation was one of a mass being acted upon by three forces, gravity, drag, and thrust. The airplane naturally wants to weathervane into the oncoming wind (lowered drag), and the engine thrust was acting to prevent it. By reading these threads, it appears to me that firewall thrust is a technique used at lower altitudes. While all the attention is centered around sticks, force feedback, and design philosophy, the elephant is the room appears to go unnoticed.