I mentioned 1980 since that was the year Ray Franz left the Governing Body. There has been no eyes and ears on the inside since that time, but for what Barbara Anderson has been able to shed light on about the early 90's.
Since 2000, with the restructuring, it is a huge black box. GB 2.0 seem less in charge than GB 1.0. At a circuit assembly, I remember Splane saying that Watchtower won't pick him up for the airport if he is not dressed in a suit.