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've done exactly as you said. I'm doing them one in every two years and I'm having fun. I don't think I've ever paid more than 5 euros for one game. They are the kind of low effort easy fun but that's exactly what I want. I have my hard games and series for when I want that type of experience