This remind me a bit of the uncanny valley hypothesis. I find it slightly to realistic for my tastes. the armor part seams ok but the face.. I'm used to the cartoonish style of wow. I do believe we need I big overhaul in this matter but not trough the realistic side.
See why can't we have more armor like this? Traditional Warcraft armor that fits. Really hate that every tier the sets are always "skinned mobs" of the instance. But I guess trial of the crusader ruined that.
They should have skinned monsters for the tier sets and traditional faction sets for the PVP ones IMO like the image in the OP.