I'm not saying Sanji is guaranteed to awaken CoC. We don't even know if Gaban has it
Its more or less confirmed only ,
He uses Axe , so Haki is the only way out to be standing with Roger and ray.
All I'm saying is you're clearly denying that haki is a big part of Sanji's growth as a fighter as well
Yes I'm.
But think yourself.
Luffy and Zoro were both trained by Mihawk and Rayleigh , Specifically in Haki only.
Whereas Sanji never has a Dedicated teacher for CoA , Yet he tapped into it. Very good tbh.
But his Haki never Grew since then. We barely got CoA Feat from Sanji since then.
Exoskeleton was more or less a CoA alternative Upgrade.
What I'm saying is , Oda is taking different route with Sanji unlike the usual AdCoC path which Luffy and Zoro were Limited to.