When a major female hero's death gets that reaction from Gail, it says something.
It says that Gail's human, with biases of her own, rather than the Goddess of Comics Feminism that some attempt to make her out to be. No character deserves to die because they're shittily written. If that were the case, there'd be no one left in Marvel, because they've all been jokes, or writer-hated, or overblown, or turned into dicks, or tossed aside at one point or another. And again, considering your particular favorite, you should fucking know better than to practically advocate that.