Good chapter!
Sort of understand all the Sabo hate, partially because he made Burgess feel marginalized but maybe he'll come back. Sabo does a lot of douchey things, thats a character trait both him and Luffy share that Ace didn't have. I mean that they do what they want regardless of how it's seen.
In my opinion, though, it was too early to even bring Sabo back into the manga at all, but since he is, I wish he hadn't eaten the fruit. I wish that he'd gotten it and then maybe I don't know, another character that Luffy chose, ate it. Hell, I'd even by happier if Rebecca had eaten the fruit (after Luffy gave it to her), but it doesn't seem right for Sabo to have Ace's ability at all, especially when he wasn't there for either Ace, nor Luffy.
I also agree that he's a little too cocky right now, I want to see that humble and polite kid that we saw in the childhood flashback. But more Koala time is always a plus for me.
The Usopp thing, I knew it would happen, and I'm glad it did I think it was done flawlessly, maybe Buggy v. Usopp will happen (or at least their followers battling each other).
That Law and Luffy scene with the handcuffs was great, it made me laugh.
How the hell Mingo is still alive beats me, but, I really am clinging to my theory that that is just a puppet Doflamingo and the real one is hiding somewhere. Birdcage, to me, sounds like when Doflamingo can control everyone in Dressrosa by his ability, AND judging by Law's face, maybe we'll get some flashback time in there. We've all been waiting.