Boss, I'm intrigued about the NTSB's alleged shortcomings. Apart from TWA800, where they apparently cow-towed to the FBI (and possibly other political pressures), they always seemed to me to be competent and open. OK, they could stand some grammatical improvements in their reports, and the 'contributory factors' they often list would be amusing were these not serious matters.
Now regarding the FAA and the TSA, I agree, but I think you misunderstand the NTSB's mandate. They have nothing to do with security, nor are they beholden to the manufacturers.