M.Mouse - he didn't say "publish every single finding" or "explain their actions or methodology".
He said "get a move on", and I think he has a point.
This page serves as a reminder of what the NTSB was doing to address the concern among pilots, passengers and the industry in general in the wake of another very perplexing accident which took years to resolve:
NTSB - American Airlines Flight 587
In particular, there were frequent investigation updates, and an intermediate Safety Recommendation (addressing one of the key contributing factors - probably enough to prevent a repetition) after 3 months.
As a non-pilot, I am not remotely bothered if this information is channeled directly to pilots and to others with a need-to-know in airlines, rather than to the press. It only takes one decent
PR/media relations person to ensure that is handled properly. No criticism of anyone in my mind - just keen to hear that investigation is narrowing and the people we rely on at the front end of the aircraft have some idea how to avoid a repetition, as soon as possible.