Interesting. I will say one of the many things I would like to do is to trace eschatology from the early church fathers. I believe I'll find it muddled with various interpretations.
I couldn't find St. John of D reference but I'm in a bit of a hurry. I'll try to look this up later.
The general Orthodox approach, following the Holy Fathers, has been to leave eschatological speculation alone. I am unaware of any commentary on the Apocalypse by a major Father. There is a commentary attributed to St. Hippolytus, but the authorship and authenticity is questionable -- it is not a work that was really preserved within the Church, and was fairly recently discovered. I don't put much store by it.
The later Abp. Averky of the ROCOR felt the need to write a commentary on the Apocalypse because of the wild speculations surrounding us in the 20th century. It is pretty simple.
The relevant sections in St. John of Damascus are very instructive because of their straight-forward simplicity *and* by reason of the fact that virtually none of what he says is drawn from the Apocalypse. The only piece of his summary that comes from the Apocalypse is actually the reference to the two witnesses -- Enoch and Elijah.
Everything else in St. John D comes from elsewhere in the Bible.
All we need to know is that the end of time for each of us is going to come sometime between now and however many years someone our age reasonably has left to live. We need to be ready now.