"Have you read Blessed Pius IX's dogmatic declaration on the Immaculate Conception?"
Oh yes, I've read it as have real Orthodox theologians (as opposed to country lawyers dabbling in it!:))Like I said, it seems to be a result of the base problem created by +Augustine's formulation of Original Sin. To my eyes, the declaration is internally inconsistent but again undoubtedly necessary if one wishes to preserve +Augustine's innovation.
One fascinating side light to all of this is that the declaration, one way or the other, seems to have had no effect on how we all respond to Panagia. Of course, that is because it really speaks to the nature of Christ and the Incarnation fundamentally.
Would the title "Spouse of the Holy Ghost" be improper for her in Orthodoxy?