I love the way they slip in that in recent decades the faithful slave has been identified as the Gb. Decades or rather in the last few months when things didn't seem to be working out as planned and they needed to distance themselves from all the crazies taking the emblems. This creates the idea that this has been the doctrine for some time and any loyal JW will think that nothing has really changed.
It is also clever the way that they say that humble annointed sisters would not want positions of oversight. This means that any annointed sister who questions their role instantly becomes proud and haughty and by association not annointed.
In historic versions of the watchtower, the belongings were more closely associated with the people now it is the material assets that mean the most and the people are really responsible for their own faith . They provide materials for preaching and teaching but nowhere do they suggest that they have a personal interest in the health and well being of the faithful. So there is no physical care component to the role of the faithful and discreet slave. It says alot that they care more for physical structures and material things.
So this relationship is all one way traffic. Jws give them their loyalty and assets and they in return give them 5 tracts at an assembly and a load of talks people will sleep through.