Just watched his vid, makes no sense to me. Oda had the idea of the 10 captains since Dressrosa, why would he scrap a mysterious 10th member in favor of Aokiji just a couple of chapters prior to the 10th finally being revealed, when explaining why Aokiji joined requires just as much panel time if not more? And to me its pretty clear that the idea that Oda decided to scrap a bunch of things during his 1 month break is nonsense because he added a bunch of new subplots since then like this raid on Beehive, Law and Kid's defeat, Cross guild as a whole and so on. At best Oda just rearranged how things would play out, I see no reason to belive he outright scrapped ideas, especially in this case since the idea of the final SH crew having 10 people+Luffy has been a thing since chapter 1, and BB having 10 to me is just a byproduct of Teach being an "evil Luffy"