Watchtower tried to make a connection with the Bible at the start of the rotation, but it was weak, SV:
Yes, it was weak, the changing of the chairmanship in the first Governing Body between sessions did not imply an ongoing rotation in that body, but then there was no mention of an "appointment until death" to positions in the early, model congregations either.
I merely wanted to point out how odd it is, that an arrangement, that would have served to broaden the base, and ferret out latent talent, would not be mentioned in a shake-up article like that.