Don't get your hopes up. Bioware had two Dragon Age games with the Eclipse Engine, one large expansion pack and loads of DLC's to try and master the hair rendering and failed. And to be honest the hair rendering doesn't look much better i Mass Effect with the Unreal Engine 3 either. So counting those games with DLC's as well they have had lots of practise but never succeed. So I doubt they'll do any better with the Frostbite 3 Engine 
I can live the the sparse amount of hairstyles avaiable in DA:I though. What really bothers me is that the hair rendering/textures doesn't look any better then what it did back in Dragon Age: Origins. And even back then it looked bad!
To be fair to Bioware (those who worked on DA), A lot of the hair was probably very basic *Because* of the pain that is rendering and animating hair - have you ever seen games that go for a realistic attempt at hair, but obviously didn't have the technology to properly pull it off?
Hair just flopping all over the place, clipping through everything, including the character themselves. Or - ooor, better yet, the hair is *Fixed* into position, and stretches, bloating the texture to look blocky and terrible.
Even people like DICE have trouble with it, and that's with cutsom-made NPC's for games that have hair, Notably the long, free ponytail that was attatched *Only* at the hat's edge, and didn't really exist outside of that, and *Still* had trouble with clipping in clothing and cutscenes.
So - I just think they went with the safe route. I probably won't notice the hair much, as long as I can create a face that I'm happy with. Most of my Wardens all looked the same because it was the *One* decent face I could make using the CC (On console, I did mod my computer version at one time.)