While it's doable for sure, I can agree on that, but territorial-wise it's better concept. Fixing something is not equal to evolving something. RP have some dead ends which need to be fixed. I think in order to create new RP and new gameplay environment some parts of old RP can be sacrificed in some bloody ceremony if it's for the best of all house.
I chosen Kyushu and Honshu because they are on the different ends of the Kusari and also are frequent used systems for traffic. So those two with Edo-Province + Shikoku + Hokkaido in the middle would make more sense then placing sides of the conflict on the distant ends of the house where no one would care about them at all.
