I was just watching this on you tube
and although talking about the Mormon church I think in principle it well describes theJWs. I think one of the solutions he gives to why people are leaving (although sadly is unlikely to be implement by the GB)is "trying to build a more open Social community where it ok if you don't believe. A place where you can talk openly about your doubts and questions. Admit the actual problems that exist in the history".
Very thought provoking video.