User blog comment:Uraharattack/King and his Haki/@comment-26905901-20190124161031

It's an interesting theory my guy.

I do have one thing to dispute, I agree that Katakuri showed us an advancement of KenBun Haki but I thought he ALSO showed an advancement of Buso Haki too, during his fight with Luffy he used a form of Buso Haki that even when Luffy countered with his own Buso Haki Luffy STILL incurred damage.

After that exchange he told Luffy 'There are things in this World HARDER than Buso Haki', I was under the impression he meant that he had pushed his Buso Haki to be harder than the standard, that aspect of Luffy's fight with Katakuri was weird because exchanges of Buso Infused Haki between them never seemed to have that same affect on Luffy ever again.

Again I think your theory is still quite interesting and this Arc will probably be where it finds confirmation or rejection.