Many people are missing the point.  
A teen from youth group actually said that he thought that since AL, the Catholic Church has changed its teaching.  He thinks that adultery is no longer a mortal sin.  What would you tell him?  God has a commandment against adultery.  We must obey God.  
There are bishops with opposite views on this.  They can't both be right.  
Did you read all of Amoris Laetitia?  Did you read the dubia?  If so, how can you consider those questions unimportant?