I am learning something lately: Sanji fans are whiners. Com one seeriously, for like a dozen chapters in a row on the sea train this manga was practically renamed "SANJI! THE PIRATE COOK!" He's HAD his moment too shine. He's had five peoples moment to shine. That said, thanks to monkey spirit for being the only sanji fan so far to even take Usopp's development into consideration.
So did Franky, and he got a huge fight with Fukuro, and he just said in this chapter now that he's going to look for Calipha. He isn't done yet. Besides, Sanji did near nothing in Water 7, so that's really just like payback. That said, I do NOT want Sanji to take Usopp's fight. That's a ridiculous idea because if that were the case Usopp would still think he was too weak for the Strawhats and let them go. He needs win this fight, definitely. However, that doesn't mean Sanji can't fight too. Think about it: Sanji just got his arse handed to him on a silver platter. He is fully paralyzed, so even in a little bit he'll still be partially paralyzed. Usopp and Zoro are handcuffed when they both need two hands to fight. Sanji at this point counts as maybe 2/3 of a person, and I'd say Usopp and Zoro are the same as well. That adds up to 2 people. 2 VS 2 sounds good to me.
What could happen is Sanji could fight Jyabura and Zoro could fight Kaku while Usopp does the "running away" schtick that he does every fight (NOT an insult. This makes Usopp a realistic character and it's one of my favorite points about him. I mean, after all, I would do that, you would do that, everyone would do that. Plus, he's done it every single fight to date, and if he dumped it now there would be no room for development in the future.). Of course, he can't run so he's dazed and confused. Sanji and Zoro fight, and begin to lose. The tides are turning, and they both get knocked down. As they're knocked down, Usopp realizes he must do something, so he whips out Bokuto and starts wailing on Kaku and Jyabura. Of course, when Zoro and Sanji get up a few minutes later because hey couldn't see this, they don't believe Usopp because he's a liar. Then they all do one huge triple-tech and knock the two out. This way, Usopp is developed, Zoro still has never lost a fight to a swordsman, and Sanji isn't just dead weight.
This is an arc about people making huge strides in power. And until Sanji makes one, I'm expecting more action, goddammit. It's great that Usopp, Chopper, and Nami are getting way stronger, and this is not sarcasm. It's incredible! I'm really happy, because until now it really felt like those fights didn't matter. And it's great that the line between powerhouse and weakling is getting vaguer. However, that doesn't mean that in order to do that we need to dump Sanji and let him get left behind - I might agree with this if Zoro did the same, but he isn't, and that rivalry would suck if Sanji was really weak and Zoro could kill him without thinking about it.
But, in the end, Omae is right: Oda has never let us down before. Even if we're bummed out one arc, he makes it up in the next one. And those who said not to complain and just be thankful we have a chapter are right as well. We will be amazed. Eventually. And it will make up for Skypeia and Water 7 combined. After all, when you rearrange the letters, Oda is 2/3 God.