Alphonsus understands Trent
Bellarmine understands Trent
Pax Vobis does not.
Father Feeney's interpretation of Trent isn't any different from theirs -- he simply draws different implications from the justification vs. salvation distinction. But I personally disagree with this interpretation. I don't think that Trent is teaching "either ... or" (for many reasons that I've articulated and no one's ever refuted). Yet I don't disagree with Father Feeney's general distinction between justification and salvation. I believe it's valid and very real.
So, according to the strict Father Feeney position (which I don't follow 100%), Trent has nothing to do with it.