The 1914 doctrine is a difficult one for the Watchtower Society because its very foundation lies on it. Yet, it is becoming apparent to many JWs that a new view is necessary. If there are changes, the Society will probably make subtle ones first to prepare the body to accept a major one later. It's possible the "generation" change was the beginning of it.
Whatever changes are made in the future, most JWs will accept it as "new light." But for some it will be the "straw that broke the camels back."