Has Wlad's chin turned into steel now?

No.

Smarter defensively, less willing to be aggressive.

Uses his advantages well but does come across as boring, what he does doesn't exactly excite but is effective.

 

To be fair, if Haye caught anyone clean they'd certainly know about it.

 

It was not a clean shot. It was just a arm punch and Wlad was still hurt. If Haye would have caught him full power Wlad would have gone down for good.

 

Your love for Wlad is not healthy. Show me one example where WLad got hit in these 8 years and was not wobbled. He still can't take a punch. That is why he takes easy fights and still jabs and grabs.

 

This is not crazy a lot of fighters get ko early and their chin get better. But it's usually very young fighters and because of being weight drained.?

 

boring ****.

 

Has your brain turn into concrete?

 

First of all, it has never been weak; average, at least;
secondarily, it is a well known phenomenon between who knows **** about boxing, chin is really slow to develop, it is still immature until 25 years old, some years after, some years before, depending on the fighter; but keep in mind, brain isn't still fully developed until 23-25 years old, for everyone, including you and me;
it seems to really peak around 35 or even a couple years later.