Once again an excellent chapter from our author who can make grown men skip with joy when a new post is up.
I have to say that you made a chapter that from any other writer would just be annoying filler and gave us something thought provoking and progressed the entire plot in more ways than we mere mortals can grasp.
I have just had one horrible thought for where the Diversion may have occurred; not long before the death of mattai we have the Hyuga kidnapping incident and Hiashi gives up his twin brothers life to cloud. But given that the Hyuga clan head in this tale does not match cannon we get...
An evil Twin!
Hizashi manages to over power his brother sends his body off and secretly takes over as head of the family. And running with the evil twin idea we could even postulate the source of some certain wild oats and extra-familial genetic traits.
Not that I think my crazy brain is any where near the mark for such a well constructed story but its just stuck up there.