It’s my belief that Oda didn’t really have a strong idea of what ACoC was until it actually became relevant in the story.
That’s why you have shit like Katakuri and Ulti using black lightning that looks a lot like ACoC.
Oda just didn’t know and didn’t care about what ACoC was. However post wano he has become a lot more consistent.
If you just look within Egghead, Luffy’s initial kick at Kizaru, WSG, and Huhava all have a very different aesthetic from any other black lightning used in the arc. Like compare it to the gura gura no mi and Saturn’s lightning.