In my opinion, the Church is losing members because it doesn't have a message that states why one should be Catholic. Prior to VII, the message was salvation. After VII, it became something different -- perhaps "building the kingdom of God on earth" -- and people felt they could do that without being members of a church. When the Church decided to cling to ideas about morality that seemed unconnected to the idea of Kingdom, many people felt there was no need for the to be there. I think a new model can and will emerge, but that this generation will die first.