Ray may have continued to be a deluded theist, but I think that his continued christian-theism delusion did a lot more good than would have been done if he became an atheist.
You see, if Ray had become an atheist then much fewer JWs would have woken up as a result of his defection. Had he become an atheist then Watchtower's characterization of his as an apostate would have seemed even more justified and would have had far more credibility with JWs.
But because he continued to be a christian he maintained a valuable common ground with JWs - the bible, belief in Jehovah, Jesus, christianity - which he can use to help them see Watchtower's error. A person who believes the bible and knows it well, has a greater chance of being able to help JWs see the error of their ways in light of the bible; than would an atheist trying to disprove Watchtower. The JW will completely shut his mind to the latter, but will give a measure of attention and credence to what the former has to say - to the extent that he can show its coming from the bible.
So Ray was a very valuable asset in helping many escape Watchtower. Many who later became atheists, started their journey out of Watchtower by reading Ray's books. That journey may never have started if Ray was an atheist. No God-believing JW is going to give credence to an atheist's criticisms of Watchtower. So Ray serves as a valuable stepping stone or gateway from Watchtower to atheism - for those who do later become atheists. For most, the journey cannot be straight from Watchtower to atheism. It has to be from Watchtower to more moderate theism and then atheism.
Don't be dissing Ray.