Hey
Just got your Hayley Mii, and I know what's wrong with it, after putting it next to the official one.
Eyes need to be a notch lower, a notch farther apart, and 1-3 notches smaller. Head shape should be the one that looks like a pentagon with the point at the bottom and an otherwise square-ish face. Since I can't alter it personally, I can't tell if my numbers are exact, so you'll need to stick them next to each other and punch "look this way" in ranch.
Also, she's a tiny bit too tall. Otherwise, it's great.