Mary is new doctrine by Church history. The Immaculate Conception was created in 1854 and the Assumption as late as 1950. Kolo can correct me but I don't believe the Orthodox place much store on some of these doctrine.
Everyone (Protestants, Orthodox, Catholics) will acknowledge what a wonderful person Mary was but Catholics have taken this over the top.
Saying the Immaculate Conception was "created" in 1854 and the Assumption was "created" in 1950 is a lot like saying that gravity was "created" when Newton defined it.
But putting aside these two beliefs, let me ask you this, why do you and others have such a difficult time with perpetual virginity? Nowhere is scripture does it state that Mary had other children. The Lord entrusted Mary to John at the Crucifixion, this would seem unnecessary if He had siblings. Neither James nor Jude identify themselves as our Lord's broher. Perpetual virginity in no way impeeds Protestant teachings about man's sinful nature. Lutheran teaching has never questioned this. Luther, Calvin and Wesley defended it. Wesley didn't leave the Catholic Church, so there's no way to say that this was an idea he just "held onto."
That's what I thought I had read, too.
The Reformers probably knew that this wasn't required teaching, wasn't really the issue of the Reformation, and had some personal growing to do themselves in their understanding of the bible.
It's one of those things on the back burner that eventually came to everyone's attention.
Sola Scriptura had to reject the Immaculate Conception, the Assumption, and certainly this Immaculate Hymen theory. They simply aren't supportable scripturally.....only externally to the scriptures.