There's just too much of it. There is too much of it everywhere. She really looks more like the main character than Tav or anyone else lol. I know that in DOS2 Fane was important for the plot, but it has never been felt as strongly as here.
interesting fact
I expect that they'll work on this on a character by character basis. And yeah she's a protagonist design specifically because she's an option to choose as your main character. All the companions are going to end up with the same treatment.