Maybe what we are familiar with seeing. There were times when parts of the Church were not able to be in direct communication with Rome, and even were not known to exist until things like the Holy Wars with the Muslims settled down. Eastern Catholics give us proof of a vibrant Marian tradition. While we 'Roman' or Latin Rite Catholics speak of Mary as the Ark of the New Covenant, most if not all Eastern Rite Catholics speak of Mary as Theotokos, literally the God-bearer, meaning the Mother of God. While we speak on Mary's Assumption, Eastern Catholics speak on her Dormition, or 'falling asleep'. The Byzantine tradition, is very open to the topic of Mary's mortality, that she indeed died, and was resurrected before assumed into Heaven. As Catholic Answers states, the Byzantine church "guards a rich treasury of teaching, iconography, and liturgy concerning the end of Mary’s life." "
Mary's Assumption in the Eastern Tradition)
The reality is that the Apostles and early Church took much of this as fact. When people tried to deny Jesus existed back then, the Apostles would say, "You've seen us and our witness to the acts of His life, and here is His mother. What more evidence do you need?" When Simon Magus tried to pretend he was the new and real savior, and was coaxed into essentially being buried alive, Apostles like St. Peter quipped how there are two graves. One that had Jesus in it, but is now empty, and the one with Simon Magus, who is still in there to this present day.
I'm perfectly fine with Scripture and Tradition. I've read early Church writings of Saints that were alive when Jesus was alive. It is true. If your are indeed honest when looking at the early Church history, you don't see a Protestant nor Fundamentalist nor nondenominational church. You see an early church that is decidedly Catholic and Apostolic, just as the Nicene Creed relates. This is not a matter of developing something new, but revelation of what was, is, and always will be.