Eh i dont know
I think oda gives Future sight to people that have certain character traits and also wants them to fight in a a specific way to be honest. Like there is a reason we see the first display of shanks fighting ever Oppening with Future sight. Because as opposed to something like ryou/ACoA this also proves that is not getting powercrept and is used by the top hakiman in the story still
Rayleigh making the comment confirmed that basiacly together with the shanks scene
I think it's fair to say CoC is a powerful amplifier in more ways than one.
Personally, I assume what people call "AdCoC" always involves a component of Armament, whether it's defending or coating a sword, regardless of whether the sword blackens or not.
I think thematically, Conquerors being able to see the future and "conquer" it being by changing it works.
I don't know if it should or not, but I think that's what it is.