Do you really read and believe what you say? As I answered in the other topic, if you want everything to be related to things from many chapters ago, that's fine with me. But that doesn't make a series better or worse. Nor do the retcons have to be bad if they are explained correctly.
But I accept the challenge, let's study if Oda really just uses retcons and writes on the fly. Let's take Wano as an example, since it's the last arc.
- We have Ryuma. A character introduced even before One Piece began. It makes more than 1000 chapters. Not only that, but we are also related to the plot of Wano with Thiller Bark through Ryuma himself and Moria's confrontation with Kaido, he makes more than 600 chapters. Can you give me a similar example of JJK and KnY? Wait, it doesn't have 600 chapters, much less 1000 to link anything.
- There are the Kokuto, which were introduced by Mihawk and Ryuma, more than 1000 and 600 chapters ago
- We have Koshyro and Wado Ichimonji, also related to Wano more than 1000 chapters ago
- There's Oden, the guy who wrote in the Golden Bell of Shandora and commander of the Shirohigue 2nd Division, a position that had been vacant long before Ace's union. That was more than 700 and 500 chapters ago respectively.
- We have the AdCoC and the Ryuuou that were introduced by Sanhks and Rayleigh over 700 and 500 chapters ago.
- This Tama, the girl who taught Ace to make hats, who was named in Marine Ford, more than 500 chapters ago.
- Kaido is related to Punk Hazard, more than 300 chapters ago.
- Then we have a lot of little things that are related 25-50-100 chapters.
This is something JJK and KnY can't even dream of. Oda is the God of relating things from previous chapters. Of course Oda doesn't have everything thought out from chapter 0, nor any mangaka, it's ridiculous to demand such a thing from them.
These messages show that you do not know what you are talking about or what you want. You criticize Oda for not having foresight, when he is the mangaka who masters this technique the most.