That is interesting, I never knew that . I have always felt that the EO's traditions were closer to the traditions at the time of the break ...
On the resurrection, I noted as you do that Christ was raised by the power of the Father.. that is consistent through scripture
It's worth noting though that the Eastern Orthodox DO BELIEVE that the Blessed Mother lived a life without sin.
Many Catholics and Protestants are also unaware that the Orthodox understanding of that nature of Original Sin and its consequences are quite different from ours. Catholic and Protestant beliefs regarding Original Sin are based on the teachings of St. Augustine and the Orthodox reject a lot of these teachings.