The post is quite right--the Orthodox have always taught that the Theotokos and Ever-Virgin Mary was assumed body and soul into heaven after her death.
How I wish your Pope hadn't waffled on this question of whether the Theotokos died! Although this particular recently proclaimed dogma is not per se a new obstacle to reunion, the fact that may proponents of it held (and perhaps still hold) that the Virgin Mary was assumed before death may be.