Ailes had a choice between conservative Gretchen and liberal Kiran, so naturally he chose Gretchen. Kiran just couldn't stand the fact that Ms. Carlson was hired such a short time ago by Fox, yet bulldozed her way to the top. I've heard that Ms. Carlson is the second highest paid female at FNC now, second only to Greta Van Susteren. Gretchen's husband is Derek Jeter's agent, and I'm sure that Brian Kilmeade loves all of the strings that Gretch's husband can pull for him in the sports world.
Kiran was a drag on the show, and I think they're all glad that she's gone.
Yep... they're better off without Kiran. Courtney may be a little short on brains.... but who cares?
From what I have seen/heard, gretchen is NOT conservative.