Yep. A further elevation of Mary. The title "mother of God" carries way to much implication that God has been created and not eternal.
It leads to writings such as this that have not been denied by the Vatican.
Let us now spend a few moments in contemplating the glory of the Blessed Virgin. Jesus is the King of heaven; Mary is the Queen. She certainly comes next to Jesus in dignity and merit, and her glory is, therefore, next to His in splendor and magnificence. She is the woman of whom the beloved disciple speaks when he says: "And a great wonder appeared in heaven: a woman clothed with the sun, and the moon under her feet, and on her head a crown of twelve stars."* This certainly expresses the highest glory and splendor imaginable. Human words can say nothing more; for our highest ideas of glory are borrowed from those beautiful worlds that shine above us in the blue ether. On her bosom she wears a jewel of unsurpassed splendor, whereon are written her three singular privileges. These are Immaculate, Mother of God, Virgin. These are high privileges which she alone enjoys, and which single her out at once as the Queen of angels and of men. The Eternal, by assuming flesh from her, united her to Himself by a bond of intimacy which is second only to that of the Hypostatic Union. He shed His own bright glory around her, and enthroned her at the right hand of Jesus. The Almighty Father looks upon her with complacency, as his own beloved daughter, faultless in beauty and every other perfection. The Holy Ghost calls her His own spotless and faithful Spouse, over whom the breath of sin never passed; while Jesus who, in all His glory, is still flesh of her flesh, and bone of her bone, calls her his own sweet and loving Mother. Can we conceive any greater glory unless it be that of the Hypostatic Union?
http://biblehub.com/library/boudreaux/the_happiness_of_heaven/chapter_xvi_the_glory_of.htm
Yeah, but they don’t worship her, dontcha know?