From CNA:
Following the reaction to the new Vatican document Mater Populi Fidelis (“Mother of the Faithful People”), Father Maurizio Gronchi, a Christology expert and consultant to the Vatican Dicastery for the Doctrine of the Faith, warned that considering the Virgin Mary as “Co-Redemptrix” or “Mediatrix” distorts the Christian faith and leads to a superstitious view.
“It is superstition to think that the Virgin Mary has the role of holding back God’s wrath. Whoever thinks this way is not in accordance with the Gospel,” Gronchi told ACI Prensa. The expert spoke about the new document this week alongside Cardinal Víctor Manuel Fernández, prefect of the Dicastery for the Doctrine of the Faith. In the text, the Vatican urges the faithful against using the titles “Co-Redemptrix” and “Mediatrix” to refer to the Virgin Mary.