Why should they trust at all their new interpretations on the issue
They have got no new interpretations, and maybe, there will be no new interpretations, because they exhausted. No "new light". The incredible sarcasm is just the fact they have got no blind idea exactly at that point in time, when the rank & file-JWs in deep despair scream for new light... They fell into their own trap. They have used up all their ammunition, because they interpreted 99,999999% of the bible, instead of - say - 95%. (If they had done so, they now had free zone for "new light" regarding 5% of biblic prophecy). But now there is no new ammunition to firework a "new light".
It is a tragedy. I wanted to weep, if I could.