Actually, the comment that started this particular exchange: "Moreover, one must remember that the Blood of Christ shed for our sake and those members in which He offers to His Father the wounds He received, the price of our liberty, are no other than the flesh and blood of the virgin, since the flesh of Jesus is the flesh of Mary, and however much it was exalted in the glory of His resurrection, nevertheless the nature of His flesh derived from Mary remained and still remains the same (de Assumpt. B. V. M., c.v., among the Opera S. Aug).”Pope Leo XIII makes Pope Leo look ignorant. I'll resist calling him stupid because science had not advanced enough yet for him to make that statement with any authority - certainly not with any infallible authority.
After a second careful reading, I do not find any point of substantial disagreement with the Holy Father. Particularly clear is this statement: “...nevertheless the nature of His flesh derived from Mary...” because it did (see my DNA discussion above).
God is the one who designed how skin is made. Now they are giving His creation of human skin over to Mary?