No one is defying the Vatican over this yet, it hasn't even been put into the translation (1 to 2 years). Will they defy Rome, probably some will but I don't think this will be that much of a problem for most bishops in the United States.
Most of the liberal bishops in the US are not exactly scholars and I doubt it's going to make a big difference to them; it's easier for their priests just to read what's written (although I think some older liberal priests will probably be the ones who don't cooperate). Roger Dodger will probably publicly defy Rome, something he seems to do with impunity, alas.