So I was right that Luffy would have a 3 billion beri bounty, although I never would've guessed that Law and Kid would receive the same bounty at the exact same time. While I realize that they did help take down Big Mom and even fought Kaido and survived, I don't think they deserve that amount since Luffy was the one who did the heavy lifting against Kaido and actually defeated him. Not to mention that since he's Dragon's son, has a legendary Devil Fruit, and is generally one of the biggest threats to the World Government, his bounty is at least justified whereas Law and Kid haven't done enough to justify their bounty increase from my perspective.
The Pluton being in Wano interests me a lot more, however. I previously assumed it was hidden in Alabasta and I thought Imu being interested in Vivi had something to do with that, but I guess that theory is out the window now. Only Uranus remains unaccounted for, although I've always suspected that the World Government has it in their possession.
And lastly, Buggy becoming a Yonko is disappointing to me. While I understand the logic behind the decision somewhat [he has a large fleet and capable fighters that escaped from Impel Down], I find it vexing that Buggy keeps stumbling into situations where he gains incredible power while doing the very least himself.