Hello,
The Society has many doctrines and practices which are plainly wrong. Nonetheless, little dogma is, from an organizational standpoint, in serious need of change -- except one. For the Society to continue any form of credibility with it's followers it will have to change it's understanding of who can lead the organization, in other words, who can become members of the Governing Body.
There has never been a member of the GB who did not claim to be of the annointed class. The current dogma, based on JW understanding of Matthew 24:45, is that the annointed take charge of the organization's teachings, even if this means delegating responsibility to members of the "other sheep." But the annointed are few in number and dying rapidly. Although there are a few "younger" members of the GB, the body as a whole is getting very, very old. Within a decade most of them will likely be dead.
This presents a problem for the organization: What will they do when there are no more members of the annointed around, or when they are so few in number that they will not be able to function as an entity anymore? Speculation is that member of the "other sheep" will one day be allowed to serve as GB members. "Scriptural" validation of such a practice could theoretically be found in the oft-used WT idea of "types" and "antitypes." They could use the example of Moses entrusting the leadership of the Israelites to Joshua before even entering the Promised Land. Moses would represent the "annointed GB" and Joshua the "other-sheep GB." The Promised Land, which Moses (the annointed) was not able to enter, would represent the New System. And, just as there was plenty of work for the Israelites under Joshua to do in preperation for entering the Promised Land, so there will be much activity for JWs to do even after the annointed have all died off.
In such convoluted reasoning, the GB will be able to keep their "spiritual validity" in the eyes of the rank-and-file, probably even touting such "new understanding" as a "blessing from Jehovah" and a further sign that "the time left is reduced."
When will this happen? My guess is the "transfer of power" will be gradual, with some members of the "Nethinim" class working as full-fledged members of the GB within the next ten years or so.
All this is speculation, but it is a likely and necessary tactic for the Society to retain any credibility.
Bradley