This is all good stuff.
If we can reach a unanimous view that it was all the pilot's fault, we can save the ATSB the busy-work of going through the facade of another 'investigation' to reach the same conclusion as the last.
I have difficulty in believing that the patent errors in the weather information transmitted to NGA, and the weather information that was withheld from being transmitted to NGA, had no influence on the crew's appreciation of the actual and forecast weather at YSNF on the way to the point at which the decision to continue or not had to be made. And the CASA FOI population, comfy behind their desks, cuppa in hand and only the pressure of calculating their pension payments to confuse them, split 50/50 on the question whether the crew were obliged to divert, based on the weather information transmitted to NGA.
But I see, from others' posts, that the crew could have and should have known more.
I see now why Erebus was the pilot's fault.