Simple, they do not address it at all. Many of the JWs today are virtually unaware of any doctrines pre-dating 1990 so there is really no need to discuss it. Myself being a born in I was not aware of many of these events and doctrines developing around me as I grew up. When the 1995 Generation change it that really started my doubts to surface.
I know of a few MS's in my cong and even a few elders who were not even JW's when that happened and I am in the US. I would imagine with the growth that took place in the 1990's because of Russia and other places that there are many in responsible positions in the org that simply do not know what was previously taught unless they research it themselves.
Short answer... the the Rank and File in general have no clue about it.