Whitebeard not being aware of Kaido's murder of Oden and not doing anything to avenge him.
The waterfall storyline with Prometheus not being here when King attacked or Perospero, Daifuku and Mont d'Or not using their powers to make the Queen Mama Chanter go over the waterfall right after. Perospero somehow being able of using his powers far later after and going to Onigashima alone.
Napoleon staying inactive and violent during Big Mom's amnesia.
Drake and Law letting Hawkins live and so blowing X-Drake's cover in a particulary unimpressive way.
The Beast Pirates not attacking X-Drake for his betrayal earlier, at least during the meeting between the Flying Six and Kaido where he would have been alone against Kaido, two Calamities and the rest of the F6.
Kin'emon's plan for the raid.
Denjiro's face changing.
Luffy and the Straw Hats letting Kanjuro escape with Momonosuke.
Luffy, Law and Kid being unable of dealing with a ship with long-ranged canons.
Luffy using G3 with Koka against a Waiter.