You know, this genuinely would have been a significantly more intelligent idea. If he was a relatively slight man who had good reason to hide his face, he could at least somewhat blend in. And it'd actually work more than well enough with the actual history - he'd be a small footnote in recorded history because he was deliberately laying low while assassining.
Instead he's a giant man of an entirely different nationality who couldn't be easier to spot if he was wearing a KFC bucket on his head.
Which is why we criticise Ubisoft. If they put some effort, they could have avoided nearly every controversy. Instead, they put zero effort due to thinking that calling critics racists is an everythingproof shield and now they deal with the aftermath.
They added Yasuke and made him a PC whose playstyle is both historically inaccurate and contradicts the gameplay the franchise is known for and is build around which serves to make him a sore thumb from all points of view.
They used a ninja as a main character in Japan but had her be overshadowed in the worst ways possible.
They used a woman as a protagonist and instead of using the fact that she is weaker than the men to have her return to a purely stealth/ambush/assassination gameplay, she had a big counterpart that can go through walls and men as if they were made from gingerbread, defeating the point of trying to find ways to sneak around and fulfill objectives in a clever way.
They did not study the culture of Japan or the architecture, making mistakes the average Japanese customer would notice such as important figures not acting like they should for the time period as well as offending them with depictions of half Torii gates and sacred monuments that are illegal and blasphemous to depict in media.
They advertised One Piece merch. as if it is a replica of their own design, stealing intellectual property.
They based their story on a historical fiction and tried passing it off as real history.
They decided to put Yasuke in purely because of the controversial Floyd Riots and did not think that there might be a problem with the one black dude acting like a human wrecking ball, dealing damage on both property and innocent civilians.
And last but not least, they called everyone racist for calling them out for all the above.
It is death by a thousand axe cuts. Each is devastating by itself but combine them and it feels like you stepped in a slasher movie set. It looks like they did the opposite of what would make sense on every turn thinking that they can do no wrong.