I'm not so sure.
When I began my "fade" from the JW religion the first thing I did was rid myself of their paradise/everlasting life fantasy because I felt it was not healthy to tease myself with this. I decided to make peace with the idea of death. It has been happening to people since the beginning of time and I did not think it was mentally wise to dwell on a fantasy that says otherwise.
It has never been a problem for me and I truly wonder if I really believed this teaching deep down inside. I feel it is just a "carrot" to attract and keep people trapped inside the JW religion.