I like what theyve done so far. Shannon Goss has done well rewriting Shogun for TV. The original Shogun mini series didn't mention the Taiko. the suit of armor shown in episode 2 is historically accurate to Toyotomi Hideyoshi, the Taiko.
The taiko was a peasant from birth but became a general under Oda. Oda was the most aggressive and successful samurai clan. when Oda Nobunaga died, Hideyoshi continued to consolidate power by conquering provincial rulers. Once he had unified Japan he started a campaign to capture Korea. the campaign lasted too long for Hideyoshi to finish. the Taiko could never be SHogun because of his caste. but he married into a samurai family and thus his heir would be eligible. Ishido and Toronaga (Ishida and Tokugawa) both need to muster entire armies for a war that needs to conclude before the Taikos hier becomes an adult.