I think most of the appointed men in the congregations are burnt out and many don't step down because there are no one wanting to serve these days.
I remenber the days when I was a child that there used to be body of elders with up to 8 or 9 elders but now I find it's common to sre congregations with four or five elders.
Plus, many elders are having to do work that in the past was done by ministerial servants as there are very few, even less than elders.
I know congregations where accounts, territories and others assignments are done by elders.
These days all male brothers I know are insisted to accept being MS and when being MS for some years, to be appointed as elders. I know brothers that now are MS that a decade ago would have never been considered.
Some brothers succumb to pressure and accept it but they don't really want to serve so just imagine how much effort they will put into it. Do you think are they doing tasks that are voluntary or that someone is not going to check if it's done?
The biggest problem for WT is apathy as there are many inside that still need to be shepherded and controlled but give nothing: no work for the congo, no contributing...
In the future WT will have to do something: consolidate even more (150 pubs per congo to have 5-6 elders on each?), assign sisters to MS roles or at least give to them some role in territories, accounting, etc or simplify how a congregation is run (most talks from the WT-TV, etc).
If things follow the same, in 5 or 10 years most of the work supposed to be done will be impossible to do as a lot of elders are in their 60s and 70s and retiring with no replacement in sight.