No, in One Piece there are many mysteries, but it is not that complex. Furthermore, these mysteries are usually narrative, which is the strong point of One Piece, not the fights. There is nothing as complex as what you propose, that literally only you have been able to decipher.
If there is only one reader who is capable of understanding things, we are in trouble.
No, AdvCoC is when contrails appear, it has nothing to do with black ligning. And the contrails are in both attacks. The only difference there may be is the much greater concentration of AsvCoC in the final attack, obviously, for a reason it is a finisher.
Where was such a thing said? It is the AdvCoA that allows you to hit without touching. Precisely, we have not seen Zoro hit without touching, therefore he cannot have AdvCoA.