You grossly exaggerate about the “huge body of doctrine” at issue in AL.
The matters at issue are nothing of the kind. Here is what the Catholic Church teaches:
1) Matrimony is indissoluble.
2) Divorce does not exist.
3) A person who, being married to someone, “divorces” that person and “marries” another, or begins, without “marriage,” to live in concubinage with another, commits adultery.
4) Adultery is grave matter.
5) No person may receive absolution or Communion without a firm intention to desist from the commission of grave sin.
That’s all all this fuss is about. AL is designed to cast doubt on ## 3, 4, and 5. Therefore, AL will eventually be repudiated by this or a future Pope, and will be rejected in the meantime by all who adhere to the Catholic Faith.
Divorce does not exist??