I think the biggest changes I have seen over the years. When I was a late teenager most of my same age comrades in the hall left and then later about half came back. Ones that were DFD again a certain percentage came back and stayed. There was also a few new ones from the world that did join.
Now that there's the internet and YouTube, young ones are leaving and a lot less are returning. The ones that are DFD less are coming back and those that do more seem to fade away right after getting reinstated. And last but not least the only new ones I've seen come in from the world are either mental or in two cases husbands of a JWs that were old and bored with life that joined maybe because in old age wanted a hope of an after life or just plain bored at home.
in the end I think theres a lot more chaos in the cult more people just plain sick of stuff and leaving , kids leaving and not coming back , mostly no new ones joining and the apathy is huge. This cult is pretty much a dead man walking .
ps. Of the mental ones that joined they all left and of the two husbands one has already died. In a friends congregation, he told me in the 25 plus years he went not one new one ever joined. Plus two of his sisters going to another hall have stopped thier both in thier late 40s and 50s. So the older ones are leaving too, sick of the guilt and the pathetic lives they were force to live being JWs.
p.s.s. Over a the Reddit forum they are getting about a thousand newbies joining per month.