The feelings of the families are not relevant. I thought that would have been obvious. It's like referring to Hitler and the Nazis when losing an argument.
The phrase "a navigational co-ordinate in the flight plan presented at the briefing was changed" is debatable, at the very best. We have the audio-tape, clearly stating that the waypoint was at McMurdo Station. We have the flight plan that F/O Cassin used to program the simulator, which also had the waypoint at McMurdo Station. We have the accepted fact that none of the attendees queried the position of the waypoint. And we have them all practising an out-and-back cloud-break procedure from overhead McMurdo Station, not a straight line descent from 27 miles to the west.
Everyone left that briefing under the assumption that the waypoint was at McMurdo Station. It was only Captain Collins private preparatio0ns the night before that led him to believe otherwise.