Dozy:
The NTSB has been a wholly independent entity with no direct relationship to the FAA since the mid 1970s.
That is indeed what is says on paper.
Any delay in providing a docket on the Alaska accident is probably due to a backlog, especially given reductions in funding over the last decade or so.
If that changes the priority of the investigation of these two commercial freight accidents, then I rest my case about the less-than-impartial motivations of the NTSB.