That's been kind of one of my big problems with Jane in general. That she's depicted as being so altruistic and perfect with virtually no, real, flaws.
Thor he can make a hammer-obsessed, incapable, and dumb blonde viking but Jane's only real flaw is...she wants to be a hero all the time, even at the cost of her health. Or she's obsessed with Mjolnir. Then again, so is Thor.
I don't get the sense she's written much differently in the Valkyrie book.