Her hair is so so bad.
I don't know how hair should be attempted, but gaming is horrible at it in close ups, especially with long hair.
In visual arts, as a general rule, you shouldn't try to paint leaves, you try to capture the essence of leaves, because they're too noisy visually. Maybe there's an equivalent for gaming hair, and if there is, people need to get right on that.
No way. Maybe the way it meets the skin, sure, could be better shadowing, but that's the best hair I've ever seen. Especially how it reacts to light and bounces with movement.