One of the main reasons why I love One Piece so much is that it’s able to capture emotion better than any shounen I’ve watched or tried to watch and, frankly, better than any anime I’ve ever watched.
Also, the way they navigate through their narratives and build their characters, whether major or minor, is top notch.
Not sure where they are in the manga (and I don’t want to know), but the Fisher Tiger and Queen Otohime flashback was incredible. One Piece has always managed to lay down foundations for its big arcs tremendously well, and it’s no exception with the current one. The themes used in this Fish-Man arc are so deep; maybe deeper than any other arc so far. Just very good stuff.