No it was needed only one punch making Kaido saying Luffy is not the same guy who got crushed in Kuri.(chap 1001)
The Ryou/AdCOA power up is lame for multiple reasons :
- visually it was always a nightmare : during the rooftop Luffy using AdCOA was visually always so confusing, we never really knew visually when he used it or not etc. It was already quite bad in that aspect.
- the explaination behind it : there are 2 stages of adCOA : the barrier and the deep one destroying the inside. Even just with the barrier you can hurt Kaido : Scabbards, Zoro etc. And we never really knew what stage Luffy used each time. During Udon training it seemed he mastered the last stage with internal destruction but frankly during the fight it was impossible to tell.
- the different ways to hurt Kaido : we learnt that that COA was mandatory to hurt Kaido, that it was a central tool to finally hurt him. But 2 seconds later : Killer, Kid, Law, Momo, Raizon etc etc all managed to hurt Kaido in different ways only using their power creatively. Law sending fucking rocks to Kaido managed to hurt him. Kid only with metal fist trying ti crush Kaido managed to hurt him etc etc etc etc.
- and the big fat last nail in the coffin : AdCOC. 2 second after Luffy first haki PU, he received an other haki PU, that trivialized the first big time. And above all Luffy using adCOC on screen made it look like he was using AdCOA internal destruction. What was the fucking difference between AdCOA internal destruction and adCOC ?? Impossible to tell on screen. Luffy was shown to send mid range punch to destroy the tree with AdCOA and then with adCOC he was doing the same..... Ok cool
AdCOA was a big fail overall