Well, I think the entire "premier female hero" is a bit liming in itself. I think that many female characters deserve to enjoy the prominence that many male character enjoy.
That being said, I agree. Someone asked if there were more female solo series coming from Marvel at the Cup O' Joe panel, and all they did was plug Captain Marvel, mentioned X-23 doing something, and that an X-Title might make the fan happy. I suppose there is Red She-Hulk.