I have also wondered what the FO was doing while Dom was trying to flightplan and access the internet. It was company policy that the FO was not required to be involved in this process. Despite this, you would think professional curiosity would mean she would have been interested to go through the exercise for when her turn came.
All will be revealed in time. The FO did not appear on Four Corners, and so we don't know her side of this story. Not yet.
Inevitably it will all come out in subsequent legal proceedings when people are subpoenaed to attend and give evidence under oath. That is unless there is an out of court settlement.
CASA looked at all records from 2002 to 2009. Only 3 instances were found of landing without alternate fuel. All 3 instances were in the two months prior to the crash (one involving the standards manager). This seems to be stretching coincidence, and makes you wonder if something had changed. If so this too will come out in time.