During the peak years of papal maximalization?
If there is to be a patron of the Church other than the Bridegroom Himself, our Lord and Savior Jesus Christ, why would it not be the Theotokos? Of course this is linked to the growing cultus of Holy Joseph in Roman Catholic Christianity. Still, if he is not accepted as the designated patron of the Church Universal by the Church Universal, does the decree really mean anything? It is just an example of the pretense of the patriarch of Rome to be a universal pastor.