Copying my post from the spoiler thread, with some new considerations:
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Man, I've been reading One Piece since 2001 (I think) and started to read weekly in 2005. I've never been so let down until now.
I see so many problems with this that I fear it may be One Piece's dreaded "Jumping the Shark" moment. Of course, Oda has enough credit for me to wait and see, but I'm really worried by where this seems to be going.
- Problem #1: The lovable underdog rubberman protagonist who rose to the top by his own effort is now retroactively a god predestined to rise to the top in this very moment of history. I really hate the "chosen one" trope played straight, so this is a big bummer for me. As prophecies were becoming more common in One Piece, I was hoping Luffy would end up as the odd element, the one who wasn't prophecized but ends up, by his own effort, enabling the prophecy to happen. Like, there would be a Joyboy, not Luffy, but Luffy, by his own choice and effort would allow Joyboy to fulfill his destiny.
- Problem #2: A zoan fruit? Of a god? That is entirely fictional and was never fleshed out before? Are you kidding me? This is piles upon piles of bullshit. By not fleshing out Nika beforehand, Oda essentially created an asspull power that can do whatever the plot requires. Even if he establishes some limits in the next chapters, it set a precedent that we can now expand those limits whenever the story needs it.
- Problem #3: It being a zoan also adds a lot of retroactive questions. For instance, that means Luffy should have forms, which include his baseline pure non-rubber flesh form, to which he should have reverted a few times in the past. For instance, when he was drowning in Arlong Park, shouldn't he had reverted to baseline, and thus died because Genzo and Nojiko would be unable to stretch him? That's the first example that comes to mind, and I bet there are plenty of others around. NOTE: As it was pointed in the spoiler thread, zoans not always revert to baseline even underwater, so this point can be contested. Still, I feel there's a complete lack of foreshadowing that Luffy hadn't a true paramecia fruit. We never got any hint of it behaving differently in over 1,000 chapters.
- Problem #4: Even the god's personality described by the Elders is like Luffy's, and, since "zoans have a mind of their own", we now have opened the can of worms that maybe even Luffy's personality and the traits that made him special are not his own, but inherited through eating a Devil Fruit. We go back to Woop Slap's question way back in East Blue: "Is it his dream, or his destiny?". There will be a huge thematic dissonance here if, in the end, fate takes over freedom in a story that has always been about freedom. NOTE: It was pointed that it would be OK because the Luffy we always knew had the fruit for 99.99¨% of the story. No, it's not ok. It would mean the true Luffy is someone we never really delved into. The real protagonist would be a deity or Devil Fruit, not Luffy.
- Problem #5: By linking Joyboy to a devil fruit, and not the Will of D or the D Clan, it diminishes the entire mystery. While once we had several D (including Blackbeard and Law) that could potentially "become Joyboy", now we now it was only Luffy that ever had the chance from the start, and just because he ate a fruit when he was just 8 years old. (At least, this opens the question of what Blackbeard really is, and what happens when he deprives Luffy of his powers)
- Problem #6: I already lost count of how many times Wano Act 3 has failed to raise the stakes, and this is just another stance of it trying to do so, only to defuse the tension soon after, before we could explore the hopelessness of the situation. This has happened so many times in this arc that is has been a frustrating read so far. I wanted to see how the characters in Onigashima would act against Kaido. Instead, Luffy returns with god-like slapstick powers and make Kaido seem like a fool. At this point, I'm really really tired and frustrated with the whole of Onigashima and just want it to end ASAP. I don't wanna see this fight dragging for another 10 chapters, with Oda trying for the Nth time to "raise the stakes" and failing. Just end it, please, and move on to more interesting stuff.
- Problem #7: Slapstick powers. I hate them. They are fine in a self-contained story, but when you try to mix it into a world that pretends to have some seriousness, they suck all the tension around. One Piece has always carefully balanced over the fine thread between silliness and seriousness, but I fear the protagonist becoming a god of slapstick may tip the scales too far in one direction whenever that power is used.
- Problem #8: The seeding for this revelation was really wonky. Not only we never explored Nika before to understand its powers, we never even heard of Nika or that the Gomu Gomu was special before 30 chapters ago. In a 1,044+ chapter story, this is a really terrible setup, especially since it conflicts with so much previous story, like why didn't the Elders started going for Luffy's head the moment the news of a rubberman started spreading around.
Maybe the next chapters will make things better. But really, right now, I'm really worried that this story may take a direction I either don't care about or even deeply dislike.