Luffy and Zoro are two interesting looks at genius.
So we saw the baboons and can confirm that the Japanese in general and Oda in particular understand the phrase, "monkey see monkey do." Luffy's gifted at his own unique fighting style but advances by reflecting observations. Crocodile's weakness, Soru, future sight, etc.
Zoro is the oblivious genius of doing. It goes with his oldest quirk, being clueless in direction, but it extends to most things. The guy can eat razors or poison without knowing. He's the champion of the Shimotsuki clan and has no idea... hasn't connected his own dots tying him to Wano but of all people, he taught Momo to say Sunacchi. We've seen him fuck people up through intimidation literally from the moment he was untied, we saw him straight up use Haki in Alabasta, and right as we see that CoC is what imbues some of the strongest weapons, we fins out that Zoro can already do it without knowing.
He will use Asura again, but I don't think that's what's happening here. Just like the training scene where he stressed being able to perform consciously, I think the key is figuring out how to draw the power without the same specifics. That's not a repeating pattern of a short story arc but I think a distinction from past arcs to Wano that circles back to scenes like that in hindsight. And maybe it does repeat from here on but I think this is where his closed eye (metaphorically!) opens.
Oh, and obviously Sanji is the third genius, being able to equal Germa's best with little to no interest in even doing so, but the other two are set apart because they don't create ceilings for themselves.