From a religious history standpoint, certain doctrines appear to be identifying and defining. But from the standpoint of truly invested members, loyalty trumps any changes in doctrine. We were, and millions still are, willing to sacrifice our families out of a misplaced sense of loyalty. I've said it before doctrine only matters so much. It differentiates one group from another, but the reason people embrace and remain JWs is the sense of belonging and security. It's generally only when a person begins to feel in some respect isolated from the group that rational discussions about doctrine and policy begin to matter.
So, IMO, if they can spin it as a positive and continue to reinforce the sense of group loyalty, most anything can be changed. I'm sure they could decide Yahweh is the correct name of God and it would be fine. lol