Finished reading it yesterday and had time to mull it over.
Overall I liked it with a few caveats.
The lack of distinction between commoners and samurai, or at least the seemingly strong identification of the depicted commoners with their samurai overlords seemed a bit off. While I understand that competent rulers would foster both loyalty and a sense of local pride in the population I would still expect to see more signs of cast separation and its enforcement. At the very least I would expect to see something like sumptuary laws that helped distinguish the castes.
Yojiro also seemed more naive than I would expect. I absolutely buy is ignorance and horror at kagenari, but everything else seemed a bit forced. Surely, even if by his nature he was kept in the dark about the details of everything going on around him, by his very upbringing and by his role as a Emerald Magistrate he would have some inkling of what would be really going on even if only in broadstrokes.
Loved that the Kitsuki were unashamedly spying on the Scorpion.