The separation of Marian titles of Mary Mediatrix of All Graces and Mary Co-Redemprix?

According to Catholicism is the separation of certain Marian titles a possible manner of procuring a theological definition in favour of the title Mary Mediatrix of all Graces? I have never been in favour of using the title of Mary Co-Redemptrix, but I can still see a glimmer of hope that the title of Mary, Mediatrix of All Graces could one day be defined. The title of Mary Co-Redemptrix does have more theological entanglements to get defined, whereas the option of Mary, Mediatrix of All Graces could possibly be defined theologically in the future, though not without nuance and theological interpretation. We all know that these titles have been out here for a long time and some popes have favoured some such Marian devotional titles. However, modern popes are not always in favour of them. Notably the Holy See has just come out with the document [***Mater Populi Fidelis***](https://www.vatican.va/roman_curia/congregations/cfaith/documents/rc_ddf_doc_20251104_mater-populi-fidelis_en.html) which discourages the usage of certain Marian titles. Both titles od Mary Co-Redemptrix and Mary Mediatrix of All Graces are mentioned. However the title of Mary Co-Redemptrix is more strongly worded not to be used. If the title Mediatrix of all graces could be disassociated from other modern Marian titles, could the possibility of a future dogma be reached? One interesting note that makes this possibility more real is that the Catholic Church has historically permitted a mass to be said in honour of Mary under the title of Mediatrix of All Graces. > In Belgium eight years later, Redemptorist priest François Xavier Godts wrote a book, De definibilitate mediationis universalis Deiparae (“On the definability of the universal mediation of the Mother of God”), proposing precisely that it be defined that Mary is Mediatrix of all graces. In April 1921, Désiré-Joseph Mercier, Cardinal Archbishop of Mechelen, Belgium wrote to his brother bishops in support of this. > > In response to petitions from Belgium, including one signed by all its bishops, the Holy See approved in 1921 an annual celebration in that country of a feast day of Mary Mediatrix of All Graces. In printings of the Roman Missal from that date until 1961, the Mass of Mary Mediatrix of All Graces was found in the appendix *Missae pro aliquibus locis* (Masses for Some Places), but not in the General Roman Calendar for use wherever the Roman Rite is celebrated. Other Masses authorized for celebration in different places on the same day 31 May were those of the Blessed Virgin Mary Queen of All Saints and Mother of Fair Love and Our Lady of the Sacred Heart of Jesus. The Belgian celebration has now been replaced by an optional memorial on 31 August of The Virgin Mary Mediatrix. - [Mediatrix of all graces](https://en.wikipedia.org/wiki/Mediatrix_of_all_graces) To my knowledge this mass has not been abrogated. I am not aware of any mass ever being allowed for Mary Co-Redemptrix. Perhaps someone can enlighten me? Thus I ask the question: **Have any Catholic theologians favoured the possibility of defining Mary Mediatrix of All Graces, while keeping the titles of Mary Co-Redemptrix a practical impossibity, due to its more complex misunderstandings and confusion?**