It's simply commonsense that they had to change the doctrine or be further exposed as frauds - even the babies of 1914 are 92 years old already, so "by no means pass away" is pretty much debunked - it won't be long before there'll basically be no one.
Gee, I wonder why this "revealing light" didn't come their way in the '50s or '60s - like it had already for the rest of us.
I'd like to say "the blind leading the blind" ...........but it's more than that.......it is plain to see that the society utilised the "less talk the better" method of dealing with that.......a brief and downplayed mention about the change new light, a dropping of the Awake note, and you have a clean and credible leader of 'wiseness' to follow again - albeit a sinister one, but lets not mention that so it''ll go away.