To summarize, the information age is killing them slowly, but the pace of the decline is increasing rapidly. This correlates well to the effects of Moore's law, in general.
WT can no longer teach very detailed and esoteric doctrine. It is either too easy to disprove, or current events have rendered it false by now. In response to this, the WT has taken several measures over the last 15-20 years to dummy their doctrine down, and simplify the "work". This has led to widespread apathy among the faithful.
The apathy in turn leads to ignoring the direction of the leadership. This is why JWs now get an education, save for retirement, etc. In response to this, the leadership tries to turn the screws tighter by using the tools of the information age, (such as the website and particularly the streaming broadcasts), to enact greater control, but this fails as well, as the leaders are seen as both uncaring and incompetent in plain sight. This in turn leads to further apathy and disillusionment, and thus a positive feedback loop has developed. Positive feedback loops in nature tend to create unstable systems.
Add to this the child abuse cases, lawsuits, (which they can no longer hide from in the information age), and the constant demands for more money, (yet another positive feedback loop in of itself), and we have a formula for a rapid decline.
d4g