Oompa,
You and I seem to be talking about different things. You are correct in saying that the society has altered their end times’ eschatology many times in the past, but what makes today's situation different is that there is no backup plan to replace their failed framework.
All throughout the past they've had something else to fall back on when their dates failed. Yeah this or that may have failed, but what about this other date? When 1925 failed, they had the generation teaching to fall back on. They analogized it to the 40 years between Jesus' last days prophecy and the destruction of Jerusalem. They told their members that the end was just around the corner because the modern generation would be similar in duration to the generation of the first century. The sense of urgency remained in place.
When 1975 failed, they had a remade generation teaching to fall back on. This time the generation was those people alive during 1914. Since Psalms said a generation was 70 or 80 years, the end was just around the corner.
What do they have to fall back on now: the 1935 sealing of the anointed? That's been done away with. That was one minor, tangible doctrine that tied them to the end being close. What else? The eighth king of Revelation being around for a "short time?" The statue of Daniel Chapter 2 showing we're at the tail end of worldly governments? That's all I can think of. But neither of these doctrines carries the significance and weight of the "generation" doctrine.
I agree with you that when they re-make their doctrine, the vast majority of JWs will quickly fall in line, but that's yet to happen. Their doctrinal framework is currently in shambles. Any astute Witness should pick up on it, but I assume most are "waiting on Jehovah" to fix it.