Yasuke is actually a fantastic choice as far as history/narrative goes.
A shame the game looks like more generic Assassin’s Creed Mapfucking+Crowd Supermurder.
Which is fine if that’s your thing, but I haven’t been thrilled by an AC game since… well, AC1.
That’s a you problem.
Personalty, I don’t want to play a game with a character creator because it means the story can’t reference the character in any meaningful way.