I agree with @cacodayum. I think it's mainly her sideburns in her hair, it's too high I think, that's all.

Also damn, Asuka's suit in this is based off her Eva right? Did she ever wear anything like this in the series or movies? I don't remember since it's been forever ago since I've seen both. If she didn't damn, that's such a cool original design idea... your works are always a retro flavored eye candy treat.

Feel like there NEEDS to be a definite line separating the ears from the cheeks. Looks very odd as-is. Otherwise this pic looks real cool.