This is going to have two major effects. First, the witlesses will only waste one day instead of two during the a$$embly that would have been the Great Boasting Session because it was nurfed to a Big Boasting Session. Of course, they will expect everyone to go out in field circus during the day the other session would have happened.
The other is that nurfing the Great Boasting Session is also going to nurf the opportunities for finding mates. Each time they do that, it becomes harder to find anyone. Great way to ensure fewer children for the future, and hopefully fewer people becoming witlesses (barring Internet II, in which case people in the field would once again be deprived of the chance to cross-reference the religion). It also forces people to marry against their wills--to those who they are not attracted to, since opportunities are fewer.
Now, if they would only nurf it to zero day a$$emblies and no more boasting sessions. If this was the truth, their official site should get the kind of repeat traffic that Joy of Satan and similar web sites get--and they do it without any help from the Establishment. Why is it that people can't learn the truth simply by going onto jw.org and doing their research from that, without having to do any door to door? And, you could get all the benefits of a$$emblies simply by having YouTube videos uploaded, and it would make much more sense. But no, they need to waste everyone's time--and prevent anyone from getting decent jobs because of when the boasting sessions are (online, it wouldn't matter).