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.
I'm not touching the rest of your comment but the Buddhism thing really shows you don't know what the fuck you're talking about. You don't need "permission" to use imagery of the Buddha, that's not how it works.
Who do you think can even "give permission" to use imagery of the Buddha anyway, the Siddhartha family? The Dalai Lama? Does he need to phone up the leaders of the other schools for consensus?
The rest of the comment is also barely touching on the subjects. Yasuke was not a samurai, more than likely just a retainer that Oda kept as a sort of trophy or show of wealth. The main issue Japanese people have is the portrayal of Samurai themselves, saying the way Yasuke fights is not right. They also gave Yasuke the family seal, which is a major legal issue even today since the design is copyrighted. The Buddha issue is not the yse itself, but the fact Ubisoft used Chinese depictions of Buddha and not Japanese depictions. They also showed the destroyed torri gate in artwork, based on the Nagasaki gate destroyed by the atom bomb and is also a protected piece. They also showed supposedly Japanese farmworkers in Thai and Myanmar clothing, and others in clothing not seen until the 17th century.