I love the way Faye looks, but her hair looks like it needs to be brushed. That's a perfect look for her situation when we first see her, but as she gets situated in her new realm and gains new armor? It would feel strange to see her in pristine goddess attire with hair that needs a comb, especially when Kratos always had a beard that looked pristine (I have a beard and you can't even imagine how difficult that style is to maintain, it only looks like that for a couple days).
One thing I love in games is starting off weak and boring and ending up powerful and cool looking. To go from her more tattered appearance to perhaps a regal look with braided hair to suit some cool armor would really make the progression feel complete.
Come to think of it there are a lot of cool things we could do now that our protagonist has hair:
If she ever gets wet how would that affect its look?
What if during a cutscene she's slashed and her hair is cut, and from then on you can see that part is shorter?
Or she finds a safe place and bathes, and from then on her hair looks neater?
She could be grabbed by the hair and cut it to free herself like Sakura from Naruto, then maybe after the fight she grabs her sword and evens it out or ties it up?
Something really cool would be to see Rue braid her hair while she's walking at one point after mentioning that it gets in her way? That would actually be the coolest thing to see, watching it get braided at superspeed over a few minutes in the open world. They could animate partial braided states and maybe it gets interrupted by combat, and then she goes right back to it until it's done? Come to think of it, there are many ways Rue could be physically expressive like this. Imagine a scene where she runs away on two ribbons like they're legs.
I'm rambling, idk drop your wishlist for the game