Those were not the "only a handful of the strongest have it" type power up lol. Acoc is arguably the current top power up. Luffy went from acoa training to then acoc. Zoro had enma to draw it out of him. What the fuck does Coby have that makes it so he can use acoc right outta the gate?
Who knows. Is it even confirmed that he's going to use ACoC? I do think that Oda could have built up to this better. Having Koby show up and do things in Dressrossa would have eased some of his detractors into accepting the obvious trajectory of the character, but we know almost nothing about what he's done over the timeskip or how strong he's become.
We know... BB was there for Board. He didn't get her. So he took Coby...
Yes. And taking an L from Blackbeard and his Commanders isn't really that big of a deal. Anyone that thought Koby could fight Blackbeard on Amazon Lily would have rightly been called delusional. With or without his commanders.
He could have gotten lose any time he wanted from that lol. He was not doing that to prove a point to the fishmen. And he did eventually get lose too. Besides, he was kicking ass in those ropes too. Not just running away.
He wasn't breaking the ropes to prove what to the Fishmen? Koby wasn't just running away. He was freeing slaves and drawing pirates away from the escapees.
Sanji has an almost comical weakness to girls. Coby doesn't have that to innocent. Like, Sanji is literally horny for girls. Coby ain't horny for innocents.
And yet he couldn't dodge? No one's saying he had to beat the crap out of them. Just run. Instead he got captured. By people far weaker than Shiryu, even though he's almost certainly far stronger than Koby.
And again, Grus, someone who wasn't hyped in coo or any haki at all, knew it was a trap. Coby didn't. And it wasn't shiryu that tricked him. It was random fodder. Shiryu was just the finisher for Garp
That wasn't a CoO feat. At least, that's not how I read it. If anything, it might have been an experience feat. And yes. It was Shiryu. Random fodder didn't land a hit on him. They distracted him while Shiryu went in to attack.