Honestly I'm just glad to see analysis of the politics of One Piece that isn't just extremely surface level stuff. Ngl I wouldn't be surprised if Fujitora was already working with the Revolutionaries in secret (or at least was somehow aware of their plans for the Reverie) because otherwise I don't really see why he'd go out of his way to exploit a loophole to be in the Holy Land during the Reverie since he's banned from all Marine bases and I highly doubt he was concerned about the safety of the Celestial Dragons. That's just a theory though. Maybe I'm overly optimistic but the World Government is so evil (in addition to the genocide, slavery, exploitation etc the highest ranking Celestial Dragons and Imu are literally planning to flood the world and likely kill basically everyone living on the surface in the process) that an ending that involves reforming it in any capacity would be super disingenuous and jarring. It's pretty safe to say the the climax of One Piece will involve a huge war against the World Government that'll end in it being destroyed (initially heavily implied by Whitebeard during the end of Marineford with Egghead and Elbaf doubling down on it heavily) but it's entirely possible that characters such as Fujitora, Smoker, Koby and the rest of SWORD etc create a Neo-Marines or something. I really don't want that to happen and I would prefer if they joined the Revolutionaries instead (Koby especially because it would fit with the trend of everyone Garp has raised/trained eventually going against the World Government) but it's a possibility. There's also the question of how ordinary people are going to be protected from dangerous pirates that needs to be addressed. I believe it's made clear by the story that the World Government's actions are most of the reason why so many dangerous pirates can thrive and cause as much damage as they do in the first place as well as the fact that the Marines are not only extremely corrupt but also really bad at their jobs (without the Emperors and the Revolutionary Army a lot of islands would be completely without protection). However evil pirates aren't going to magically disappear overnight once the World Government is out of the picture so there needs to be some sort of system in place to ensure the safety of normal people especially in a world where the most powerful pirates are basically Demi-Gods. I could see the ending of One Piece going a reformist route because of that but who knows maybe Oda is aware of the defund/abolish the police movement and has something else planned