Yes Gorb, the 1990s was a time of doctrinal “adjustments”. There was also the relaxation on “alternative service” in place military service. Which was a huge issue in some countries. Plus the whole “vindication/sanctification” thing, which has now been reversed to more of less the original teaching. This was another huge change, considering how prominent “vindication” used to be in the old literature. So much so that one time it was “vindication” described as the most important part of our message, and even that the purpose of Jesus coming to the earth was to vindicate Jehovah’s name first and to save mankind second. I don’t think they’ve returned to going that far in the recent literature. There was also the new idea about the “given ones” to draft in non-anointed brothers onto the Governing Body committees. As you say, the new cooperation with outside historians on the Holocaust too, resulting in a special history unit also at Selters in Germany—since closed down by Ted Jaracz in 2007.
And don’t forget perhaps the most significant change of all in the 1990s: abandoning all charges for the literature, essentially ending the era of Watchtower functioning as a publisher of religious material and morphing into something else, the ramifications of which they are still grappling with financially.