Going to miss Libby. She was very easy on the eyes. She should have worked harder to save herself instead of whining about getting votes at prior tribal councils.
Back to Chris Noble, here is his answer from his exit interview on RHAP about not playing his idol;
"I don't play that idol because for me to win the game I needed to get more out of it than just that tribal. And, I have to have faith in all the work I put in for 22-days creating bonds and relationships to protect me from a possible blindside. Unfortunately, that was not the case and I got blindsided. I knew Dom was going to vote for me, so... and Wendell, so that was not a surprise. I went in thinking that if Dom and Wendell- especially if he had an idol- if they both had idols, I was playing mine. If neither of them played anything I was playing my idol and it was really just a tossup whether I was going to play it if Dom played, you know an advantage or an idol. So, I took the risk because if I take that risk and I don't get voted out, I have that idol with the power of [?] finally, next time around, and who knows what happens there."
I get the first part about building relationships and relying on them, but he loses me quickly thereafter. My interpretation of his thought process is that if either Dom or Wendell, or both, played an idol or advantage Chris would play his. If neither played an idol or advantage, Chris would play his- but it was a tossup if Dom played his. I can only surmise that it boiled down to Wendell and whether Wendell played his idol (if he had one, which he did). For whatever reason, had Wendell played his idol that would have have been the trigger for Chris to play his. Based upon his statement regarding relationships, he must have thought that he could out-muscle Wendell in a head-to-head vote among the tribe.
Oh, and production took his idol from him. Snatched it up right away. He didn't get to keep it.