I am glad you have more confidence in them than I. I agree the teachings of the Church are solid and unchanging, but I am afraid that is not always the case with the USCCB.
IMHO, I would rather have a Fr. Z in my foxhole than a Cardinal Wuerl.
I have been surprised by Wuerls ambivalence? He has been acting like a careerist, the type who has always been the bane of the Church.