I actually think that their approach has been changing to try and claim they are concentrating on reaching as many people as possible. The carts are in public places, where people are. JW.org is available 24/7 in hundreds of languages so that (in principle) anyone anywhere can access Bible Truth (tm) without the need to wait for someone to knock on their door. The D2D work continues in exactly the same way in terms of organisation and with the same visibility and focus.
The latest reduction in magazines and the shift to essentially a round robin of brochures means that Witnesses shall be encouraged to push route calls to being progressive studies or drop them for more productive work. The use of electronic media is natural for many people now and saves precious resources.
The R&F don't see a reduction in focus on preaching and are lapping up the changes.
Of course, the reality is that all of the above allow the WTS to reduce the manpower and resources needed to produce the literature. It saves an enormous amount of monthly burn and will make what they have last longer.
I've no idea if there is any knowledge or understanding that they are increasingly going through the motions, have no hope of realistically reaching let alone converting vast numbers of the global population, are actively undermining the sense of urgency they try and create elsewhere and are sacrificing whatever efficacy with preaching they had simply for fiscal gains.
What I can see is that they are increasingly open (desperate even) about getting born in kids baptised at as early an age as possible, perhaps recognising their only hope for long term survival is to bag the hearts and minds of young people as early as possible.