Engineering aspects post event aside and purely from the piloting standpoint, I was hopeful what I would consider the actual root cause for the event in flight would at least be listed as a contributing factor - but sadly no and so a huge learning point is lost for the industry.
The answer lies in the question - why would a pilot respond in that way to what would have a been a minor over speed event?
From the report it seems to me the 'distraction' element (still valid but to a far lesser extent) was a far easier and more politically safe factor, instead of scrutinising the bigger issue.
In any event, some other good lessons were learned and I'm very glad (the tragic CC injury notwithstanding) it didn't take more severe consequences as is often the case.