As many (including me) have said: the facial structure itself is done well. it's the too wealthy look in his face that kinda destroys it for me right now.
In the quoted picture it's better than ingame (in the gameplay vids, f.exp), though.
I think somebody as Geralt, who is constantly on the brink of being broke, constantly exercising or fighting, always exposed to nature should have a lean, "worn in" look on his face, hungry, wolfish - meaning slim, slightly fallen in cheeks (low bodyfat percentage), imperfect skin (important, Geralt is no model, he's a rough badass), prominent features.
Unnaturally noticable eyes (one of his main features). He's supposed to look like a real character, not some random model-ish guy with a scar and contact lenses to add uniqueness.
I think CDPR has still some work to do on Geralt,