For many years the ostensible reason for meeting at homes for the book study was for building closer relationships(we knew our JW neighbors in the hood) and of course, so that we can more easily stay in communication during the 'great tribulation".
I think they are going to invent a great tribulation to have a good reason to rid themselves of the expense of the KH's while getting the assets. I fully expect that this will happen in the next few years. Not because I am psychic, but because I am paying attention and have been doing so for over 40 years. They are and have been playing with the minds and building up the paranoia in JWs across the board for decades. Here is the thing-even the LEAST faithful in attendance that have been indoctrinated with this stuff will likely fall into the JW way of life again if they get them falling for it again by appealing to that built in paranoia about the world. Like the Manchurian candidate-they just need to use a code word or a situation (even invented by them) to get lax Jws activated. There are plenty who believe the crap, they just aren't willing tolive it or go along with it or don't care to bother their pretty little heads with the details. Most people are not that intellectually curious. But, push the right buttons and you get things like extremists, birthers, preppers, tea parties and those border activists of various sorts.
the WTBTS has been pushing buttons for years, seeing what works or not with various crowds. People aren't that complicated. And the WT is a master of manipulation.