For me, the report did not really drill into the underlying reasons for the accident. Given that this report was 18 months in the making, I thought that it would be very detailed. The NTSB reports like to track the history of the pilots in their earlier career, through their recruitment into the airline and their detailed training history within the airline. Failed checks and commands etc are fair game.
My own unfortunate experience is that airlines have a dirty little secret of a group of poor pilots. How big this group is depends on sound recruitment, training and a plan of how to deal with those who are not able to meet standards. The slightly steep, Exeter, approach should not be a very challenging one, especially for a 19000 hour pilot. I'd bet that these pilots had a long history of poor performance dating over many years and various airlines. How they were recruited and why the airline did not act over the FO remains a mystery. What can we learn from such a mystery?