The EO have a much more level-headed understanding of the role of Mary than the RC (the Church I was raised in), which has effectively made her a co-redemtrix. This, in my eyes, is largely responsible for the feminization of the faith.
Co-redemptrix means she participated in the Redemption, but not in a necessary capacity (much like the "necessity" of a 2 year old child helping her mother bake cookies). TWO people's hearts were pierced on calvary. Jesus by the spear, and Mary's heart spiritually pierced, as prophesized by Simeon in the Temple. As early as 150 AD, the Church saw Mary as the New Eve, just as Scripture pointed out that Jesus was the New Adam. Thus, if two people took part in the fall, two people also took part in the redemption; One person absolutely responsible for the Fall/Redemption alone (Adam/Jesus), and the other person, though not necesary, nevertheless participated (Eve/Mary).
This line of thought has existed in the Church from the very beginning. I am not quite sure what you mean by "feminization of the faith".
Regards