Thanks S.B great question, as someone else said. They do this a lot of course, picking which bits they say are symbolic and which bits literal.
I spoke with an old J.W a few weeks back, and though much of my side of the conversation was showing the errors in having faith in the words of men, he maintained that he felt the J.W's had "got most of it right", I did not launch in to lots of stuff, or anything much that I could have, as I feel at this time he needs the religion, he is in his eighties, and his wife is terminally ill.
But he DID say he could not believe the figure of 144,000 in Rev. was literal, which surprised me a bit, I just said "Yes, if that is literal why not the all that is in the verses around it ?"
I hope to speak with him again soon, not to attack his faith in any way, but to be a support to him in his time of need, I love the old boy, he was a generous guy, and an Elder that, rarely, for an Elder, "got his hands dirty" by doing work other Elders would have assigned to someone else. Work that many did not know he did, he would tidy up a garden for one of the J.W's for example, but not many would have known of this, or the other things like that which he was accustomed to doing, he was a real Shepherd too, he did real pastoral work.
But, if a chink is appearing with him, a lifelong J.W for over 80 years, then others must be having more questions that they do not push to the backs of their minds.