In that sense, it would have been better if Yamato had never been introduced. Imagine a person spending 15 minutes explaining to you why this is the most delicious cake ever, only to end up telling you that you won't get a piece of it. That's how it feels right now. Oda screwed the fans. That being said, her existence doesn't make any sense anymore because the plot would have worked even without her. Yamato tells dozens of times that she wants to join Luffy, and in the last chapter she says that she won't join because... she wants to travel through Wano. What? This is absolute nonsense. It's quite an impressive achievement to bring something like this to the final chapter of the worst arc yet. Goda has surpassed himself. Yes, I'm really pissed off.