She does look very realistic and her expression is spot on as well. Ideally your renders only need slight adjustments in post-work, like light correction to make the skin pop and correct poke-throughs. Full blown effects can be difficult to manage because they can leave ugly marks on an image (waves for example or noise). What I tend to correct on most characters are unrealistic head positions and shoulders which look unnatural (many vendor's poses have head rotations which are not possible since we can only move our neck and never the head. This looks unnatural). I add veins, bone and muscle definitions, all of which adds realism...so, here they were, my two cent....your render is looking good! Keep up the good work!