Making a new head is going to present it's own unique challenges but if you're going forward with that, I hope you'll not mind a few thoughts presented for your consideration.
I like the design - but as SiC mentioned might be brought up - there's something to be considered about the eyes. So I thought I might mention a few options which you could consider. (I will point out beforehand that if you decide to ignore these, I think going with your original option is cool as well.)
1) The Miraluka lack eyesockets
In the comic Unseen, Unheard, we get to see Visas before and after her wounding by Nihilus.
This is before Katarr is totally wiped clean of life.
And here she is, after her wounding aboard the Ravager.
So there's that to keep in mind, for the canon obsessed.
2) Going a different way - by sticking closer to reality
Had you considered basing the model on the actual voice actress? Kelly Hu would be natural place to begin . . .
Or if you prefer to see view in color . . .
However, I'm enjoying seeing what you're coming up with. Best of luck!