If they did, they'd have to put a mighty spin on it. They'd have to ride hard, "the imperfect man" scenario and hope that the old ones would still cling to them and count on a kind of "whatever" from the new ones.
The Catholic church survived because they are a "tradition" and institution in more peoples lives. Is the JW religion that much that it could survive?
Before they do any admitting, I think they would be busy transferring monies into other places so they could hold their hands out and say "we don't have any money to pay out"