Just as it has proved impossible for the WTS to predict correctly what God will do, I think it’s pretty much impossible for us to predict what the GB will do. Predicting the actions of deranged and deluded people is no easy task. I can’t see them ditching the name Jehovah’s Witness for JW, in spite of the KFC analogy. And I don’t think they’ll abandon The Watchtower either, although they may remove it from public distribution in favour of a new, glossy alternative with a title not associated with Jehovah’s Witnesses.
And I think they are worried about numbers, they always use them to support their claim for Jehovah’s blessing and direction on their activities, and I can’t see them abandoning that lightly, even if most of them are sitting on the fence.
Where I see changes more likely is in the consolidation of their role as the FDS, as they are paranoid about apostasy and need tighter control on the R&F thinking processes. As part of the 144,000, who will rule in heaven, it would not be such a big step for them to declare that they have now, while still on earth, been enthroned with Kingdom power. They are the Princes that will stand up in the last days. Their rock-start status will be enhanced and their demand for unquestioning loyalty will thus be cemented, and while this may lead to an exodus of the less indoctrinated, I doubt it will be anything like three quarters of them.