Vale is a strong and well defined female character. I'd sooner see any canon regular male character killed rather than Vale. Vale is in many ways the spiritual successor to Tasha.
Also, Vale is played by Katee Sackhoff in my mind brain.
Granting, for the moment, that she is a strong and well-defined character, that doesn't mean that I have to like her, nor does it mean that she should be immune from the universe.
As I said in the Fallen Gods
review thread, I find Vale immature and unprofessional these days. I don't have the book with me right now, but I recall her acting ridiculously gung-ho throughout. None of the moderation I would expect from a freaking XO.
And I disagree about her being the spiritual successor to Tasha. Tasha was rarely so hot-headed, and was always
a consumate professional. In some ways, I would say that mrhová is more Tasha's successor than is Vale, although she's very different in other ways.