Regardless, he has gotten the most attention post TS beside luffy.
Only momo has argument, even if u take that he is probably no longer that important to the story, which benefits sanji
Sure, if you wanna say that, go for it.
But it doesn't necessarily mean "second MC", or "deuteragonist". Chill.
And, let's be honest, the one plot where Oda wrote a real and compelling internal conflict for Sanji in the post-TS, which was the gene awakening thing, he chose the "easy way out" where nothing really had any consequence of repercussion whatsoever.
The Raid Suit? Gone.
The genes? Got all the good stuff, none of the bad.
Hitting Osome? Actually Queen did it.
Asking Zoro for help? Nothing came out of it.
Even the freaking eyebrow reverted back to normal.
The "what's more useful to the Pirate King" page was awesome, don't get me wrong, but, in the end, it meant absolutely nothing because there was nothing out of it.
Sanji came out of this ordeal the exact same character. No personal change, no growth, no nothing.
Which is basically the reason that I advocate for the "Black Hair Evil Sanji" thing. If you're trying to write a internal conflict for a character, you NEED to have a moment of ACTUAL conflict.
Think like when Gon loses the restriction and uses everything to beat Pitou. Imagine if, after that, he was just back to normal after seeing Killua crying for him.
That was basically what happened here.
I still wish for this plot to have a follow up, because it was a very interesting and compelling one, IMO.
BUT, as I've said, it is just s theory and nothing more, for now.
Vegapunk looks like 90% of the One Piece female cast, not just Sora.
Take it easy.