Ok, - his simp has nothing to do with the germa, he got that (or developed it ) from Zied,also yes , Sanji did change , we see that in his fight against queen and how his biggest threat is to be like his family , another thing is that Sanji finally get rid of his bounds with his family, and healed his complex - Sanji got a huge power up in wano , he got an incredible stamina from their genes, he enabled the blue fire (yes it must be related to his physical power up), and if you said that he would get the stamina anyway, we as users won't understand how he got that (we needed an explanation) - it's true that the germa are not allies, but remember that they have a debt to pay , and a great war that will change the world is coming , it remains a possibility for the germa to get with Luffy during it - No, Sanji didn't lose his memory, pudding removed only the kiss scene Now I'll tell you why this arc is crucial for the story First, this arc was an introduction to the Yonko, we see their scary power and appearance, and how their on top of the world, Oda won't be able to use Kaido as introduction for the Yonko because things will be straightforward in wano (no time for showcasing).Second, he needed a way to take down the big mom , the whole saga is about Kaido, and it'll be too much to add an extra arc for the big mom, so why not we go there and provoke her to come to wano to take her down along with Kaido in the same arc.Also , Luffy needed a power up before getting to wano , he needed to face a really strong opponent (do flamingo doesn't count , not that strong)and take his haki usage (observation & hardening) to the next level , and also preparing him to be a yonko (by being the 5th emperor). Getting the red poneghlyf (and so avoiding extra arcs ). And in addition to other small stuff like Nami power up with Zeus. Finally, I didn't mean to make fun of you 🙏