'Tis a fine line indeed between blame and fact finding. For example, is the statement: "Well, Capngrog sure screwed the pooch on that one", affixing blame or stating cause? Without identifying the cause (Capngrog screwed the pooch), how can we possibly understand the event and formulate procedures to prevent a recurrence? Tiptoeing around an assessment of an event should not be tolerated. Facts (cause) must be stated plainly, and one must not be required to "read between the lines" to reach an understanding of the facts (cause). If Capngrog's otherwise mediocre reputation is sullied by stating that he "screwed the pooch", well, then, that's life.
I believe that the AF 447 flight deck crew made many errors on that fateful night, and these errors must be plainly stated so that they will understood and not (hopefully) be repeated ... with a further loss of life.
Just my opinion.
Respectfully,
Capngrog