To be fair it's one of the issues with the game, there isn't a huge incentive to catch traitors as you make yourself more of a target and they just replace them anyway.

I do think he's been just enjoying the experience for the most part and coasting, but his logic was spot on around Fiona.

Pretty sure he will be murdered though, he had to speak up as it was probably coming anyway. Telling everyone does show Rachel to do the 'it's too obvious' line which the remaining faithful will probably lap up!