I would say that up to about 15 years ago all of what the corporation printed was mostly reprinted and recycled stuff on about about a 10 year cycle. Know what I mean? So if you had 10 years of Watchtowers and books you had about all of their current teachings. I came to that conclusion when I did research for talks. Would find all these references on a point or scripture with little difference between them, often word for word. Same crap recycled over and over.
So now it's different, how it's all dumbed down or it's explanations about their (failed) generation doctrine or their (failed) anointed class growing instead of shrinking. More like damage control.
What hasn't changed is the corporation doesn't want you to think, ponder, reason. Just mindlessly follow the leader. That's all there is to being a JW today, follow the leader, parrot what they say. So say your in a car group and a conversation starts (on your 1/2 hour drive between return visits) about whether or not some old faithful servant will be a leader in the new system. The most spiritually minded one will say "the F&D slave has counseled us not to speculate on that." Everyone else will think "I wish I was the spiritual one that spit out that counsel."
That's it----modern day Jehovah's Witness.