Now I know what Mike really lacks (I figured that looking at Chris Avellone ) - it's wrinkles! Yes.
It just seems to me that his skin looks a bit too clean, too smooth. Wrinkles can always fix that. Like a normal map (oval, smoothed around the corners) that can be scaled on Mikes forehead automatically, linked with an expression to the eyebrow movements (i.e. eye brow raises, normal map appears and gets scaled).
On another sidenote to eye movements. They gotta move quicker, but maybe that's not possible due to the lack of animation frames (?). How many fps does the animation system support? 15? 30?
Something I thought looked really great where the eyes of characters in Culpa Innata. Yeah I know, that crappy looking adventure game. But one thing that the game really did right were the eye movements. Everything in the face seemed to be static, but the eyes. That helped tremendously to the lifeness of characters. No wonder, as the company who developed Culpa started out as a service company for facial expression. Still, I suggest Obsidian looks into this game and pays attention to the eyes.