Looks like people don't really get how the exoskeleton works.
It's not breaking and regenerating, instead it's getting deformed and/or dented and then just puts itself back into its original shape.
So it's more like a very flexible and at the same time very durable and resilient mass of iron. That's how you can picture it.
What's bugging me tho is, did he finally awaken it during that snake attack or did he already have it?
Probably impossible to tell right now.. Perhaps we get confirmation about it via his inner monologue, cause the weird feeling (presuamblx exoskeleton developing) might be gone now.
I'm still expecting a big strength increase, especially with all that "How can I hurt his Dino body" remarks.
But yeah, Calamity fights round2:
Enma haki cloud Zoro and Exoskeleton Sanji prolly gonna dominate now.