Nope, not at all. I can care less about One Piece. I am only here to critique it. I don't care what direction Oda takes with One Piece. Also, I didn't put Gol Roger on a God like pedestal, that was Oda. I don't write One Piece, Oda does so I don't understand why you are blaming me? I am not the one that had every episode of One Piece start off with a Gol Roger quote. I am not the one that made my entire premise of my story about Gol Roger's treasure. That was Oda.
This isn't rocket science dude. You can easily measure if a situation in a story was retconned or not. This is the definition of a retcon,
"A piece of new information that imposes a different interpretation on previously described events, typically used to facilitate a dramatic plot shift or account for an inconsistency".
Please show me where in the manga where it was foreshadowed and developed that Luffy had a special devil fruit? If there are no examples, which is the case here, then by definition it is a retcon whether you like it or not.