Per usual, the Watchtower has made what on the surface appears to be a clear-cut doctrinal change, but it’s left itself plenty of wiggle room to change its stance in the future and claim it didn't make any predictions but only suggested certain possibilities. Meanwhile, all baptized JWs are expected to accept and view this new understanding as "truth." Those who don’t embrace it subject themselves to excommunication. Yet, the WT is somehow not prophesying. Who said you can't have your cake and eat it too?
Let's look at some of their weasel words:
Although we cannot measure the exact length of “this generation,” we do well to keep in mind several things about the word “generation”
Translation: Although we refuse to be held accountable for our predictions, this is what JWs must accept as current truth.
It usually refers
If we change our minds yet again, we never said that the generation definitely means this or that. It usually means what we said it meant.
He evidently meant that
We're not saying we directly speak for Jesus or know with any certitude what Jesus meant. JWs, however, will know that they must accept this current understanding as truth or face disfellowshipment
There's even some built in wiggle room in these words: "That generation had a beginning, and it surely will have an end. The fulfillment of the various features of the sign clearly indicate that the tribulation must be near."
Notice the words "surely will have an end" and "tribulation must be near." The WT doesn't say "will have an end" or "tribulation is near." The words "surely" and "must" leave open the room for a little bit of doubt. For example, "surely the bus will arrive on time" is an expression of an expectation that the bus will arrive on time as it perhaps has many times before. This is much different than saying "the bus will arrive on time," which is an affirmative expression saying something will definitively occur, i.e., don't worry, the bus will get here at its scheduled time. The same holds true for the words "must be near." More wiggle room.
Would any reasonable lawyer advise his client to sign a contract or a deed with such uncertain terms? I think not. Yet many of us made the unfortunate decision to figuratively sign a contract with this religion via baptism. Live and learn, I guess.