I agree with your first 3 paragraphs, the philosophical differences between airhreads and nutballs notwithstanding!
As for the Men's division, we heard it was 4 on 4 with Colton standing alone. He says he's not used to associating with Misfits while Matt was promising him he'd stay in exchange for info on the women. We had also heard that Troyzan wanted Tarzan gone. The conclusion is that the Frat boys could have gotten the numbers or could have neutralized the idol by splitting the votes between Colton and Tarzan.
Colton; gameplay or bragging? Good question! Instead of getting in the dark recesses of his mind, I prefer to look at results and he is now on top. Quite an unexpected turn-around.
As for Christina not being there to play the game, Jeff was the one that noted it and he asked Nina if it gave her hope that Christina didn't want to play. Nina agreed. Also, Sab's outburst that men would have dealt with conflicts directly was in reaction to Christina's words. Add Kat and that's 4 people supporting my view. Maybe we can also add her "friend" Monica who voted against her! And I doubt Alicia would defend her!
What Christina learned was to play nice but Survivor isn't a game to play nice. Not when you are being thrown under the bus. Old Mo was going against Nina all along so Christina let her ally down in order to look nice. She would have been better off telling the others that it was time to change the alliance, that she would be strong and trustworthy. It almost worked for Flica, another one that was there for the experience.