Maybe the future of the religion is to change from an "intellectual" religion to a faith based religion (faith in the worst sense of the word). In other words, they don't even try to give convincing evidence to back up beliefs; just accept what the wiser Big Brother says.
It wasn't always like that. When I grew up in the 50s' amd 60s' we were given intellectual reasons (however specious) to have an intellectual framework for our belief system. Someone mentioned a change for people under and over 60. Perhaps that trend will grow as the old-timers die out; and the GB become more cynical, as I think they'll have to, to keep their position. Just believe, they'll say. Their private thoughts will be: "after us the deluge". That can work for them until they're buried in the graveyard with Rutherford.