I though she would have been and should be a replacement for Rhodey. I guess they could have called her War Maiden or something similar. If Bendis can write her series with the same character he did with Mile Morales, then this should be a good read.
I'm a huge Tony Stark fan and I'm a little frustrated that they don't seem to know what to do with him. I think he would have been a good mentor to her as she took over for Rhodey. Fingers crossed that both characters can be done right.