Dennis,
Good point (as usual). I would just add one thing to reinforce what you've said.  

I think there's an inherent assumption by religious leaders that the nones accept the basic concept of the need to be "saved" via religion.  As such, their logic will almost always center on "restoring" things to the way they once were.  

I'm not at all sure that this belief (the need to be saved) remains intact today, even among many who still are active in their faith communities.  If I'm right, it might explain the why religious leaders keep asking the question of "how can we get them back," when perhaps a better question might be "what questions should we be asking here?"