Yasuke is a questionable choice for a protagonist. It breaks with the pattern of inserting a fictional character into the world, you’ll never convince me that his race was not a calculated factor in choosing him, and his status as a samurai (and portrayal in western media) is largely based on a single historian’s work with questionable credibility. Ubisoft has used the Oda family crest without permission (the family still exists today), used imagery of the Buddha without permission (retracted, may have been the Budai), used a destroyed torii gate as advertising material; and for how much they bleat about historical accuracy, their trailers are chock full of inaccuracies.

I do not believe that a character is enhanced or ruined based on their race, but Ubisoft is definitely exploiting it.