Shogun (FX | Hulu)

[Yuma]

This is the rub right here. They can't really expand beyond the source material (or historical material), because there's not much story after Tokugawa wins--his victory is complete after Sekigahara. Kind of like complaints when the show Rome ended fell on deaf ears with me. It basically ended with the Pax Romana, so unless the show was going to become I, Claudius, it had reached a natural ending.

I imagine they could conjecture about how everyone's lives moved on after that point, but the point they just passed was the most exciting point in all of their lives. Just as you say, how would they captivate us further?