PNF knew what PF was doing, there was no mystery. It is a fairytale. He was constantly scolding the PF to descend. And probably not from looking at the ss. He also could see, feel, and understand the results of the "inputs" made in the other seat. (Not so much lateral, eh?). What is mysterious is the lack of a decision to take over. Only occasionally, did PNF input with his ss, (a very bad idea). Then, after relinquishing the controls to PNF, PF took them back. Thus far, no orders do we hear from the COMMANDER.
Sadly, with the informations to hand, the arguments will not stop.