Luther certainly has not conferred upon Mary what the Catholic Church has. He has, however, conferred upon Mary what he believes is supported by Sacred Scripture. Not Mother of God with a capital M to honored above all other creatures. But mother with a lower case m, the young Jewish girl chosen by God the Father to be the earthly mother of His only begotten Son while He was incarnate.
They are consistently inconsistent.
The whole concept of the "adoration" (to use the catholic concept) of Mary has grown so much since the 3rd/4th century it has gone way beyond her statement in Luke where Mary says, "For behold, from this time on all generations will count me blessed."
There is no clear cut answer on this other than an appeal to Scripture. It is the one source we all agree upon. And none of what is taught about Mary in catholicism is found in Scripture.