The arcs not over yet and this chapter ended far too positively. I've been saying it for well over a year now, things are going to take a turn for the worst and Sanji is going to do something that his siblings can not. I certainly don't mean in regards to cooking either. We will see a feat of strength or capability that will fly directly in the face of Germa.
I do agree though that Oda really has been holding back a lot of Sanji's prowess when it comes to fighting and it's giving me flash backs to Usopp from Skypiea all way up until Thriller Bark. Usopp certainly had an amazing showing against Luffy but beyond that I kept wondering what is Oda doing with Usopp? Why won't he let him get a nice win against some big named enemy. Saving Robin was wonderful but not what I wanted until Perona. It was after the Perona moment I could see he was steadily building things up for that major moment.
I feel this is somewhat similar only Sanji himself doesn't have any insecurities about his strength, only fans. I get disappointed when Sanji doesn't get to go all out but I think compared to a ton of folks here I can easily keep things in perspective. Yeah the brothers and sister are doing an awesome job with their sudden attack but don't forget Sanji off paneled Yonji and disfigured his head. Don't forget Sanji kicked Niji's face so hard his neck nearly broke, didn't flinch from the kick being thrown at his face and only stopped putting up a fight when the Zeff threat came up. Even the spoilers about Sanji getting shot have people up in arms but when you actually see what happened it looks like it barely phased him. It's like reading headlines and never the article. Only after people do read the article they can't seem to shake the feeling that the initial headline gave them.
I know Luffy's fight is done and its very atypical for someone else to begin a major fight this late in the arc but I wouldn't put it past Oda to have Daifuku and a few others begin a counter attack on Germa, stop the siblings and fly after the Sunny with Sanji left to take him in the air something. Or even worse/better, Germa manages to get to Big Mom in an attempt to destroy the cake and it's Sanji who manages to stop them.
We'll see. I just feel like it's one of those things that is building up to some awesome reveal of power. Even if it's just a chapter or two of fighting I can't imagine Oda wouldn't give this Sanji focused arc a fantastic battle revolving around him. Or maybe he really will just have us wait until Wano. Boo!
edit: Oh and the light blast that went through Oven? Keep your pants on. I guarantee you it will end up as nothing more than scorch mark in the exact same way that Luffy blew a hole through Hodi. This aint White Beard taking damage.
edit again: Oh wait, the scorch mark is already seen this very chapter lol.