The thing that urks me is that Sanji had magical character growth within a 3 day span. He barely had any internal conflict to wear it. He went from trying to throw away the suit to saying he needs to wear it to protect his crew. No other scenes inside. He just went through that whole character switch offpaneled. And I think it was rushed and lazy writing from Oda's side.
So, Sanji's internal struggle that you are actually wanting to see, already was happening during WCI itself my friend. His resolution with his family, and his internal struggle was THERE IN WCI arc. And not after it.
And his words then to his father inside Capone's castle, ended it.
And then the icing on the cake was actually when the Vinsmoke came for Sanji's and Luffy's help at the end, specially with his siblings.
You are asking for things that was ALREADY happening to him in WCI. And that's why I disagree my friend. And I think that he didn't need to have any internal struggle in Wano about the issue. His character was supposed to have "GROWN" in WCI ending. And not in the arc after! And he did with all the scene I mentioned