The point is, there are people who would have objected if Archer/Phlox had made either choice. As I expect you knew.
My point is, the choice is a false dichotomy, so what they choose is moot. It'd be like getting mad about whether some one answered red or blue when asked what their favourite food was.
Killing off a liked character might literally be a character assassination, but this topic is more for figurative ones.
That's...what I said.