You have asked many things at the same time, I do not know everything and a quick google search we all can copy paste what others have learned. I could be wrong but I doubt you have read all of this information for the sake of this thread. So in response to your copy/paste I have to do research.
It will take me time.
Rock - is the Vatican considering officially proclaiming Mary Co-Redemptrix or not?
"Some excerpts from the first article above, about Mary's triune role as co-Redemptrix, Mediatrix, Advocatrix:
Second Vatican Council: “Therefore the Blessed Virgin is invoked by the Church under the titles of Advocate, Auxiliatrix, Adjutrix and Mediatrix. This, however, is to be so understood that it neither takes away from, nor adds anything to, the dignity and efficaciousness of Christ the one Mediator.” (Lumen Gentium, n. 62.)
Pope Leo XIII: “The recourse we have to Mary in prayer follows upon the office she continuously fills by the side of the throne of God as Mediatrix of Divine grace; being by worthiness and by merit most acceptable to Him, and, therefore, surpassing in power all the angels and saints in Heaven. Now, this merciful office of hers, perhaps, appears in no other form of prayer so manifestly as it does in the Rosary. For in the Rosary all the part that Mary took as our co-Redemptress comes to us, as it were, set forth, and in such wise as though the facts were even then taking place; and this with much profit to our piety, whether in the contemplation of the succeeding sacred mysteries, or in the prayers which we speak and repeat with the lips.” (Iucunda Semper Expectatione, n. 2)
Summary of Correct Doctrine
Jesus Christ is our Redeemer, Mediator, Advocate. Christ is assisted by the Virgin Mary in her triune role as co-Redemptrix, Mediatrix, Advocatrix. The following 13 points are an important part of a correct understanding of this doctrine.
1. Mary's triune role as co-Redemptrix, Mediatrix, Advocatrix is a reflection of the Three Persons of the Holy Trinity.
2. All three aspects of this one role are substantially different from, and wholly subordinate to, Christ's triune role as Redeemer, Mediator, Advocate.
3. Mary's role is different from, and subordinate to, Christ's role because, in God's plan for Creation, the role given to women is different from, and subordinate to, the role given to men.
4. The "co-" prefix in co-Redemptrix refers to Mary's cooperation with us; it does not mean that Mary is co-Redeemer, not even with and under Christ. (The "co-" prefix should not be capitalized, since it refers to our mere human efforts towards our salvation; the "R" in co-Redemptrix should be capitalized since it refers to Divine efforts towards our salvation.)
5. Mary is not a co-Redeemer and is not able to save anyone, not even with and under Christ. Christ alone redeems; Mary merely immerses herself in all that Christ does toward our redemption. Her role is not co-redemptive.
6. Mary is Mediatrix of Grace, but not of all graces. She is not Mediatrix of the graces that flows from Christ's Divine nature to His human nature; there is no mediation within the hypostatic union of the Divine and human natures of Christ. She is not the Mediatrix of the graces that she herself receives from Christ; in that case, she is the recipient, not the Mediatrix. In all other cases, Mary is the Mediatrix of Grace.
Our Lady of Medjugorje, message of August 31, 1982: "I do not dispose all graces. I receive from God what I obtain through prayer. God has placed His complete trust in me. I particularly protect those who have been consecrated to me."
7. Mary is also Mediatrix of Divine Providence and of mercy and of all that God does within Creation, except with respect to Christ and herself.
8. Mary is Advocatrix. The term "Advocate," when applied to the Virgin Mary, is theologically deficient because it lacks the feminine form, which would distinguish Mary's different and subordinate role from Christ's role as Advocate. Use of the Latin form of the word allows a clear theological definition to be attached to the term, unfettered by the various connotations which the word "advocate" has when translated into various languages.
9. The expression "Advocate of the People of God" can only be used to refer to Jesus Christ, or the Holy Spirit. The Virgin Mary has no role of advocacy herself; instead, her role as Advocatrix is to immerse herself in Christ's role as our Advocate. Mary is not "Advocate of the People of God," but rather she is a humble assistant to Christ, the Advocate of the People of God.
10. Mary does not stand before God as co-Redemptrix, Mediatrix, Advocatrix. In truth, only Christ stands before God to redeem, mediate, and advocate. The Virgin Mary humbly kneels before Christ, in worship of Him, as she assists Christ fully in His work of redemption, mediation, advocacy.
11. Mary's role as co-Redemptrix, Mediatrix, Advocatrix is not properly described as a role "with and under" Christ. The term "with and under" does indicate that her role is subordinate, but it also improperly describes that role as if it were a separate role. In truth, Mary completely immerses herself in all that Christ does for our salvation. She has no role of redemption, mediation, or advocacy of her own; all her acts toward our salvation occur in Christ, not "with and under" Christ.
12. Mary is truly co-Redemptrix, Mediatrix, Advocatrix. But this true doctrine is neither the fifth Marian dogma, nor is it the final Marian dogma. The claim that this doctrine is "the fifth and final Marian dogma" is a serious theological error which contradicts the teaching of the Church. The further claim that the declaration of this dogma is necessary to usher in a time of peace, or even the last days, is a false claim.
13. Theological works about Mary's triune role as co-Redemptrix, Mediatrix, Advocatrix should omit any and all references to various false private revelations, including those of Ida Peerdeman at Amsterdam and others. A number of false private revelations have preyed upon the faithful by using this doctrine, or their own distorted version of it, as bait to drag unsuspecting souls into a trap of false teachings and false worship. Any teachings or documents on this topic should either omit all mention of such private revelations, or should clearly condemn them and the false doctrines which they promote."
Mary as co-Redemptrix, Mediatrix, Advocatrix < click
