jcjeant, I hope you know "the pilots made error" is not a good "cause".
Why did the pilot make the error? Can we determine this if that is the proximate cause. Is the real cause is faulty training and we stop at "the pilot make a booboo" the investigation served no purpose for the general public. And in that case I'd prefer the lower ticket prices had this investigation never taken place. If the data in BEA hands can lead to one or more aspects of training, manuals, instrument presentation, cockpit culture, or anything else that needs fixing, then fix 'em to the extent it's feasible.
Just don't stop at "the pilots made an error" or there was a "defect in the plane".