I can't say this enough, but I love OP flashbacks. They almost always hit the spot. It is particularly interesting watching Oden gather the most diverse crew I have seen so far - Minks, Fishman, Transgender samurai, Bandit, Ninja - Oden's crew is definitely something else.
And I really like how the character of Orochi is being written. He has been working for 21 years to get to the position of Shogun, and from such a lowly life too. It doesn't matter what type of character he is. He seems to be a great tactician, something a Shogun is actually supposed to be.
Finally, seeing Young WB was amazing. In MF, WB's death hit me a lot more than Ace's, and so seeing him in his (almost) prime is like getting an unexpected bonus. But, Oda shouldn't had used WB as a hypetool for Oden. Oda has already casted him aside in favor of Xebec.