Have you forgotten that the only reason Cochran is still in the game is because of the scheme? By all accounts, it was his time to go last time, and he would've been voted off unanimously and then humiliatingly defeated by Christine in the duel - a girl who from all indications would've joined up with Ozzy's team anyway, so the numbers still would've been even.
I think the very least he owed his team for keeping him in when they really didn't have to would've been to NOT spill the beans on who they were giving the idol to, giving them at least a chance to have won round one of voting by luck of the draw. But no, he laid all their cards on the table - despite Coach's team not giving him the slightest indication who THEY were voting for.
And his move made absolutely no sense, strategically. He's now 7th on his new team, with absolutely NO VOTES from his old tribe. On his old team, worst case scenario, he was 6th, with potential pity votes or even spite votes (vs. Ozzy) from Coach's team if he made the final 3. Plus he had some sort of alliance going with Dawn and even Jim, who'd readily use him to oust Ozzy. So that's Top 5 or Top 4 right there... luck of the draw na lang. For someone who claims to have studied Survivor as much as Cochran has, I can't see the logic of his actions. No strategy in going further than his current standing, and no loyalty to secure final votes.
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Having said that, my ideal situation for last week would've been NO MERGE, then Ozzy defeated by Christine and sent home. Then their team losing the challenge, and Cochran being sent to Redemption Island.