Obviously Katakuri got mad portrayal during the wedding already, but Oda that sly mofo made Jinbei use his purely physical move "5.000 brick punch" back then. Very convenient for such a scene.
Katakuri wouldn't be able to shape himself around stuff like "Arabesque Tile True punch" or "Shark Tile True Punch" for example.
Imo Jinbei is actually even one of the few who atleast could give Katakuri a fight thanks to his Fishman karate.
And shown WsW for me isn't any higher than he was before. A potential YC2+3 competition is just too damn powerful.
Jack will just dwarf him in stats. Cracker in his armour would mercilessly beat him through those oversized scratch trees and after a bout with a guy like Jozu he would be a sack full of broken bones.
Recency bias keeps kicking in, but he's definitely below YC3 lvl, while Jinbei is on it, that's why he's beating such a guy at high diff and not high high or extreme diff