When Luffy and Doflamingo fought, much of the dialogue was centered around how Doffy’s societal manipulation was effecting Dressrosa. Doffy and Law had a past together, and they talked about that past. Bellamy and Luffy talked about their ideals,and how Bellamy wasn’t going to alter his life path even though he knew he was being manipulated. Luffy and Lucci had dialogue about Robin, Luffy and Arlong had dialogue about Nami, Luffy and Katakuri had dialogue about family and such, etc.
And sure, there was dialogue about power levels in these fights, but only when it was necessary, the overarching plot was still the main focus.
This fight so far has had no dialogue about an overarching plot because Wano doesn’t have an overarching plot. This arc had been a story about getting strong enough to injure Kaido, and nothing more. So of course when Kaido and Luffy fight, they’ve got absolutely nothing to talk about and the dialogue is 100% “such power level!”
I think I’ve read Chinese propaganda manwha with deeper dialogue than this shit.