No direct contradictions, although Amoris seems to differ from what the other two would have done. It is mostly a question of style. That St. John Paul was a dissident at Vatican II is documeted, while Benedict was with Hans Kung at the time, but departed from his old liberalism. Francis in manner and managment is definitely a Spirit of Vatican II pope, although he speaks nothing but respect for his predecessors. Its what they do. Its a club rule. If you think the Trads do not think Francis is a departure, listen to George Weigel.