There are times e.g. when the parent must not answer or engage the offspring by giving "answers " .  This goes for any person in authority .  If these 4 are so befuddled when even we the laity comprehend what AL says maybe they should ask for clarification from us.Pope Francis owes absolutely no explanation to anybody .  The document speaks for itself .
The 4 just plain do not like the concept of synodality which is that every bishop is as much a bishop as the rest of them .  
That's why the men chosen must   be discerned prayerfully.