I already said Yasuke is a historical novelty. But again, Adams was really one, too. He was at best, an advisor, in real life. But if he was the hero in this game, there would have been no controversy. And so what? A sword bearer isn't as admittedly prestigious as being a Bannerman, but it still is a samurai position.
So yeah, it does come down to being "White man: Yay! Black man: Boo!".
And again, if you believed Ubisoft, then you're an idiot.
-Edit: I will give you the rap thing, though.