To me what ruins the headsculpt is the beard.
1) It isn't full enough
2) He didn't have a mustache.
In this movie he didn't wear his xmen suit, which sort of is unlike Wolverine. The way we recognise him in the black suit he wears in The Wolverine is basically thick beard, no mustache, badass black suit.
However, now they thinned out the beard and added a mustache he doesn't even look like this interpretation of Wolverine anymore, it's the combination of the suit and bad facial hair accuracy that ruins it I think.
I realised this when I saw this headsculpt on the The Last Stand wolverine figure, and it just clicked, the headsculpt looked good on it. On this suit however it just doesn't look like Logan anymore.