This is too cute. I like the way you've done it. The highlights and wide, tiny eyes make for a unique style and really suits the emotion here.
If I were to make one improvement, I'd try a different method of blinking. Since the eyes are tiny already, making them smaller makes them nearly invisible. Making the eyes a little wider at the same time would solve this.
Looking better. But there seems to be some issues with the blinking. Parts of the emote get lighter and parts get darker as they blink, and the eyes still seem to get very faint. Just a heads-up on that.
Usually when emotes blink, their eyes turn from vertical slits to horizontal ones. You might want to consider trying -_- eyes, perhaps 2 pixels wide, when they blink, rather than playing with the opacity, which doesn't seem to be working out.