I absolutely love how you sorta transferred the horsiness to her skin color and face also!
Mixed-type creatures are just much more fun when the transition between the two parts is more fluid und spread instead of just sticking some random person's torso on a decapitated horse.
I myself have a centaur character with whom I tried to do this. He has a longish face, straight nose, dark beady eyes and so on. I'm not sure whether he comes off as horsey looking like he does but I just tried to implement my own intepretation there. And thinking of it, he has a similar coat/hair coloring too