ThirdWizard=The entire crew of the Pegasus seems cracked. They have an admiral on board who will willy-nilly kill them, apparently, and the conversation with the crew talking about Six's blank eyes is just disturbing. What surprises me, actually, is that they haven't just started taking guns to each other and had some serial killings or that Cain hasn't been assassinated yet. She's like a Mirror-Mirror Kirk without the kill-anyone-machine. Or maybe she's like a Gould without the glowing eyes and powers/tech. Everyone should probably be looking to kill her and take her place, but it seems like the rest of the crew is insane, yet unable to do anything. Obsessed with the chain of command? I doubt it.
Just keep in mind, Cain has many of the command codes, that she knows only . Remove her, and there is a great possibility of a non-functional ship. But your thesis, on the crew going dark plays more than the other part, of someone bumping her off. Keep this in mind. 700 crewman were killed in the surprise attack, out of how many that work on onboard a Battlestar class ship.
These 700, had friends aboard that ship, and it is great possibility, that many had serve with Cain for quite a while. As a example, her former XO, who was shot by her. The remaining survivors of that incredible and heart rendering attack. Saw other Battlestars and ships go up quick, on the first nuke assualt.
I think in earnest, those who were left, were so shell-shocked at what happened, fell into that trap, for an eye for eye bit. Everyone...including Cain. So in the end. If nobody wanted to replace her, even if she shot several people for any slightest disagreement on orders and such, it is because, everyone on board, or almost everyone, wants revenge in the worst way. And they don't care how they get it.
That term is called tunnel vision. Which has been nicely illustrated through the lower ranks of the Pegasus to those in the hgher echolon of command.
This is where, as some people would say, the main objective has been obscured to a point. And this was made worse, to the fact, that Pegasus has been alone since the major attack. But one odd thing. The Civilian engineer drafted into the war, what happened to his ship, as he said, that Pegasus got him from?