Marco Polo I guess I'll have to look up the mechanics of quoting a specific part later. Since this looks like it is just a whole post reply. My memory for recent stuff is going to be crap since the content isn't inspirational and isn't very intriguing to me anymore. So I'm not mistaken that Oda was introducing Zunisha back and being further back up in Wano Kuni. At least we will get a potential explanation or at least more teasers on the "punishment" behind the human that was forced to eat the true "strongest" fruit ability (no longer Akainu).
With true context of Yonkou physical defense/durability (which is a combination of natural toughness => Big Mom's "iron balloon", but also includes things like level one defensive haki, fruit benefits, physical strength [the greater the muscle mass and coordination, "abs of steel" can be an accurate description], etc.) we have already seen ALL physical attacks be useless. Kaidou is supposed to have the greatest defense and durability in the entire world, but Big Mom always was similar in her defenses. So to me, this is the same thing as saying "with enough building on Luffy, it'll take its toll". Based on the mechanics, no it won't.
Oda made all of these things haki dependent. It is the magic of haki. Basic of the basic haki capabilities cause magical effects that are EXPONENTIALLY greater. Kaidou's defeat is driven by and partially based on the Scabbards and Oden being able to use level 2 haki (which is still a basic technique just in case). Oda is creating clear B.S. by having the complete negation of basic defensive techniques. Immediate contradiction is Sentoumaru and the weakling Boa sisters. With proficiency of basic defensive busoushoku, even Yonkou/admiral attacks can be turned against them. Sentoumaru is now potentially stronger than Luffy and Kaidou if that's the case (only exception is if haoushoku coating has greater penetration/distance).
With ALL of the action, Oda purposefully took out ALL defensive boosts. Is he going to continue this even with Shanks, Blackbeard, and all the admirals? How the hell does he explain the astronomical endurance decreases (relative to true powerhouses fighting for 7+ days => not only Aokiji vs. Akainu but also Jinbei vs. Ace). Soooooooooooooo much B.S. and worst of all, Oda seems FREAKIN HAPPY to run with it and make it worse.
For Law, the crater already existed (per Momo's comment). Also context implies it is from Law's first usage (Big Mom confirms she took the same attack earlier during off screen action). One tiny crater is still nothing compared to half of a GIANT island. We see Law going fully serious and only cutting one tiny mountain that Aokiji created. This scale is what true Yonkou/admiral power is.
I've seen this many, many times, which is exactly why I'm a blunt *********** when it comes to analyzing series. Negativity and money is what drives change. If the fans accept the stupidity, contradictions, B.S., or whatever deviations from literary perfection, it only reinforces the bad content. This is the norm for any long lasting manga series. One Piece had the chance to be the one exception, but Oda's damn pride is the curse, but also blessing that helped create the original 22ish years of literary perfection. It's too bad there wasn't anyone brave or influential enough to tell Oda when this all started in WCI or when WSJ people started to recognize it during the early parts of Wano Kuni.
No series I followed ever had this fast of a crash to being relative crap (One Piece is still more connected/believable than most series but again I will not be able to turn off the 14ish years that I had of literary perfection). No matter what happens, that will be my expectation and everything below that is a disappointment. Oda had the plan and work ethic to achieve a perfect series. That is now impossible with 2-3 years of B.S. content chosen to be official. If it was only WCI, maybe they could have done something crazy and chose to remake and republish the originally planned content, but Oda has run with all the B.S. changes since and doubled, tripled, quadrupled, etc. down with various Yonkou weakening, delaying Sanji's development/continuing the B.S. belittling of him, etc.
It is as simple as I had nothing to poke holes at because it had literary perfection. This crap is clearly not anywhere close to literary perfection. Sure it's still better than most series, but one stupid decision with Frog-Carrot B.S. is the trigger for all of this avalanched/chain reaction B.S. It's pretty sad that I look forward to two new/minor series more than One Piece and Dr. Stone…