Chris also secured an idol which Devens could have denied him. He also got Lauren to give away her idol, which she needed for herself, which is a huge move in Survivor.I wouldn't advocate voting against him due to the twist.. I advocate not voting for him based on what he achieved in the game.
Rick said it best... Gavin never had his name written down. Gavin wasn't a good orator and didn't present his case well... but I don't think Eric outplayed them. He won one challenge (barely) and won a fire challenge (only by a bit). He gets credit for taking the risk of going against Rick... but 1-2 feathers vs potentially a lot more.
His win was arguably unfair for all the reasons I listed, but I give him credit for pulling off what he did with the hand he was dealt.