Yeah it's crazy how early some stuff like Wano was introduced. That's honestly why I like One Piece so much because it feels like everything that happened early on is still relevant to the story unlike a lot of shounen anime and manga.
I liked Thriller Bark a lot, idk there is something about it that I just find so entertaining, it is a very fun arc and the villains are great, water seven is the best arc in pre time skip one piece, post time skip it would be egghead island