The interesting thing is that objectively, Zoro is a little bit stronger than Sanji. Yet to Zoro fans, this was not enough. They needed complete domination. Their boy had to match the captain, not the cook. They reasoned only he, as a Supernova, could have CoC alongside Luffy.
Zoro fans fired the first salvo in the 'war' between the two fandoms. 'Broke his leg against Vergo,' 'No CoC,' 'Just a cook', 'Judge's genes,' 'Abandon your dream,' etc. Instead of basking in the knowledge that their chosen one would extreme diff Sanji, they created more and more distorted and delusional narratives, culminating in the disastrous 'ZKK'.
Accept it like we have for a long time, Zoro fans. Luffy is a cut-above for the most part. Our lads are still important, even if they're not the big guy, so to speak. No matter how much you try to manifest Zoro to Luffy's level, Sanji will always scale to match Zoro.
The only thing unfair about it is that Zoro trains all the time, and Sanji does not. However, this is perhaps the difference between hard-work and natural talent. One is a self-made swordsman, the other is genetically modified super-soldier prince. Difference is, unlike Naruto, Zoro's hard-work does come out on top.
People's denial over this reveal is kind of ridiculous. It's not even amusing; it's just sad.
This is a brilliant day for all the Sanji fans who knew that Oda would eventually prove them right, that Sanji scales with Zoro, and that he will be relevant in the end-game. Be humble, Sanji bros.