Funny, I read COC and came out of it with the opposite impression.
As pointed out by Blueblades, Ray did document that on the occasion mentioned a majority or th GB wanted to change the doctrine of when Christ came into heavenly power and the last generation started. However, the bylaws which Knorr and Freddy Franz tricked the GB into adopting when they siezed power requires a two-thirds, or supermajority vote to change anything. Those two knew what they were doing, the GB has been hamstrung by that requirement since. All the dominant ones have had to do is to maneuver things around to keep those who want chage from getting enough folks on the body to get that majority, and change becomes quite impossible.
So I get the impression from that, and other things I've seen around on the net, that a significant protion of them don't really believe most of the teachings. But the present a different face to the rank-and-file for the sake of their position and power.
Forscher