Lyman,
How can one say "there are a multitude of unpublished areas" if one has not seen anything? Speaking in generalities is useless, specific 'omissions' can be discussed.
" what the aircraft was doing, what the automatics were doing, and what the pilots saw on their instrument displays" is all extensively discussed in the report, with all the relevant data as recorded. I really am at a loss what data could possibly be added to better understand those topics. "What the pilots saw" is asking what went on in their minds, and that was not recorded.