Yeah maybe it was not the best timing to want to draw butts with S-snake and Bonney in the arc lmao but that level of fan service isn't too crass compared to other manga let's be honest. That shit is tame, feels like lots of you only read one piece.
You shouldn't judge him by recent westernized standards, high school aged girl fan service is extremely common in manga in general.
On the other hand, they heavily censor gory shit, they have different morals.