You're probably right about Yamato. All the sideboob we're getting from her shows promise. I do hope her character gets fleshed out a bit more, but design-wise, she gets my approval as a crew member.
We can only hope for some Ulti nudity. With all this buildup in Wano, I really need this kind of payoff. I'm also sure we'll never see her again after Wano, so Oda better use her right.