Surely more support from the pilot non flying would have reduced the workload on the captain and avoided his becoming task saturated?
More "support" from the PNF can be interpreted two ways. From the PF point of view or the PNF point of view. Too much"supporting" is often seen by the PF as irritating, superfluous and worse still, distracting. It all depends on from whose viewpoint.
We have all seen the situation where the PNF thinks he is doing what he thinks is the right thing and offering ideas, and advice but which drives the other pilot nuts dealing with the stream of words of encouragement - some of which is out of pure nervousness and even arse covering for the sake of the CVR and Big Brother..
In reality, the PNF is only verbalising what his own mind is thinking - all of which is not genuine SOP support but a chatter. In turn, this becomes counter productive as the PF is forced to acknowledge each transmission or comment or risk the PNF thinking "the bastard is incapacitated or in the "Red Zone" and needs more help and so the babbling continues.
There is something to be said for the old days before CRM was invented as a cottage industry. Then the PNF closely monitored an approach and silence was golden allowing the PF to concentrate on flying. Only if something was out of the ordinary would the PNF assess the flight path progress or whatever concerned him, and then would make a succinct comment which nowadays would be called a "support" call.