Something I have noticed about "new light" is that it is ALWAYS released to correct an error that has become painfully obvious.
As an example, the 1914 Generation change in 1995 happened because it became painfully obvious that those who saw the events of 1914 were dieing off.
Another example is who the Faithful and Discrete Slave is. It was originally taught that Russell was the FDS. When he died it was painfully obvious that we was not the FDS, so Rutherford redefined it as being ALL JWs (Then known as Bible Students). When they started teaching that there was a "Great Crowd" and a "Little Flock" of "Anointed" people, it became painfully obvious that the FDS was not all JWs. This is when they changed the FDS to only the "Anointed Little Flock". After that they started bouncing back and forth between the FDS being the Governing Body and the "Anointed Little Flock" and they are still bouncing back and forth to this day