Shanks being a "rat" was the only interesting aspect about an otherwise poorly written, generic gary stu with zero depth. With Shamrock taking that away, the ideas of shanks being some kind of "secret final villain" or serving any significant antagonistic role have been flushed down the toilet. Even shanks fans themselves started to realise how flat the character was, which is why they are the ones that have been pushing all these outlandish shanks antagonist theories. They wanted to put him in the big boy final antagonist group. They deluded themselves in to thinking shanks was some kind of complex, nuanced, mysterious 200IQ character who controlling the whole one piece world. Shanks purpose is to simply be "cool" and give children and pea brain adults a hit of dopamine when they see nice guy win against not nice guy. He was never going to be anything more than that.
Not only is shanks character affected, so has his potential power ceiling. Shanks is not getting that endgame antagonist boost. He will be taken out before the endgame begins to pave the way for the true endgame players. The "good guy" that will be scaled to the endgame villains is Dragon, not Shanks. Oda's recent glazing of shanks along with the movie is an indicator of his impending downfall. Now Oda just needs to get his celestial backstory out through shamrock/garling lore. When that's out, Shanks will be dispatched once oda decides to move the story forwards.
Not only is shanks character affected, so has his potential power ceiling. Shanks is not getting that endgame antagonist boost. He will be taken out before the endgame begins to pave the way for the true endgame players. The "good guy" that will be scaled to the endgame villains is Dragon, not Shanks. Oda's recent glazing of shanks along with the movie is an indicator of his impending downfall. Now Oda just needs to get his celestial backstory out through shamrock/garling lore. When that's out, Shanks will be dispatched once oda decides to move the story forwards.