mm43, thanks for that trace. It painted a very sad picture for me. At around 2 and 13, you had two pilots making control inputs, and given the way the SS inputs are summed, PNF's inputs (though this was a very late in the game state, maybe not recoverable by that point, somewhere around 10000 feet) of nose down were nulled out by PF.
Horror of horrors, to me, is that even after the control change to LHS the RHS was still making SS inputs.