Much as I would love the whole WTBTS edifice to come tumbling down , I just don’t see it (barring some completely unexpected event like a major schism or financial or sex scandal involving higher ups in Brooklyn.)
Comparisons with the WCG are somewhat misleading as that religion basically fragmented following Armstrong’s death. The WTBTS managed the transition from a single charismatic leader to a committee without too much blood , successfully managing to suppress dissent in the late 70’s. Unlike the leadership of the WCG the WTBTS would never apologise or admit any fault.
The vast majority of JWs in the West are 2 nd / 3 rd or even 4 th generation and it is basically a glorified social club for them with a huge web of supportive connections through friends & family. Few have any interest in doctrine or any interest in the history of the WTBTS , other than what they are spoon fed via the DVDs. The WTBTS have cleverly engineered something of a “broad church” where it is possible to stay quite happily a JW despite missing most meetings and engaging in token ministry. The “world” has been criticised to the extent that while most JWs are pretty bored with their lot , “there isn’t anywhere else to go” and with the ban on “independent thinking” & denial of further education most are dumbed down so much that they lack the capability to research or think out of the box in any way. The WTBTS has successfully created a “Stepford Society” of bored drones.