I'm just going by what my eyes tell me. I saw the trailer and immediately thought "uncanny valley." I hadn't seen anyone's reaction to the trailer, I wasn't spoiled by other comments. That was my immediate reaction.
Granted, I'm watching it on youtube and the compression might not favour the video. But having seen Maslany in ORPHAN BLACK and PERRY MASON, there was something missing from her face that was in all those other roles.
And it's not texture--unless by texture they mean all the little micro-expressions on her face. I don't care if her hair looks plastic or her skin looks rubbery--I accept that as the Hulk in her. But it's the facial muscles that I need to see to read her emotions.
From what I understand, they put dots on the face of the actors and then the imaging tracks those dots. But it seems like they would miss a lot of information that way and then have to create the expressions on their own. I guess if they are really good at it and study the actor, they can replicate those expressions through computer art. But it's not really the original performance of the actor that we're seeing.
It seems like there should be a simpler way to do this. Such as filming Maslany, processing the film to make her face green and then adding some effects to that face to make it more Hulk and grafting that onto the body of the stunt double.