User blog comment:Fliu/Chapter 931: Henshin A Go Go Sanji!/@comment-30395642-20190201131751/@comment-24850639-20190201154028

I had the same problem with Sanji using the Raid Suit this early, but his quote kinda made up for it in my eyes. He's totally right, they're up against yet another Yonko, and the slightest hesitation or miscalculation means that people die. He was putting the suit on as means to disguise his identity, not necessarily give himself a strength boost. It just so happened to grant him an ability that he's wanted since he was a kid. It's not like Oda didn't make it clear that he still hates it - but more importantly he's going to have Franky and Usopp redesign it so that it's more "him" and reminds him much less of his family.

Big Mom's amnesia is going to serve multiple purposes, it's just not that clear to you at the moment because you already believe you have an idea of this will culminate. The main thing I want to remind you of, is that people in general tend to recover from amnesia by remembering aspects of who they are. We've been wanting to learn about the "Rocks" crew right? The favor Kaido owes to her? How the island where she ate Carmel transformed into Whole Cake Island, and Tottoland? How she got such a ridiculous family, and who these fathers were? We may not get all of these answers, but her having amnesia is perfect opportunity for Oda to begin to tell these stories. I hightly doubt all her kids are going to have amnesia too, so it's not like the Big Mom Pirates are out of commission this arc for good. This is nothing more than a setback.