How much does Michael Grant have left?

Someone compared Grant to Wlad in terms of chin. The problem is that Wlad's style is suited for someone with good reach and questionable chin. And you could see him adjusting his style after losses, learning how to clinch, etc. Whatever you think about his style, at least it works.

I haven't observed any of that in Grant's fight. His can't change his chin, but at least he could've worked on his defence and on using his size. He started boxing very late and he is 36 now, so I don't think he can change a lot now.

That means any time he meets half-decent opponent he loses.