One shouldn't confuse a personal sectarian penchant for the whole of Christendom.
I think, if we are to keep this civil, we need to aviod emotive terms like "sectarian" and "penchant". Christianity is a divided religion, so the beliefs of Orthodox Christians are no more or less "sectarian" than Calvinists or Catholics and since the Protestant and Catholic traditions are so large within Christendom, it is hardly fair to refer to them as "personal" and "penchant".

What would be more interesting would be more detail of the Orthodox view on fallen humanity and exactly what was the nature and meaning of the sacrifice on the cross.

I am not sure why you are presenting Augustine as a western Saint. He was a doctor of the early church, before the schism and his teaching on unbaptized infants going to hell is not accepted by the Catholic church either.

Jesus himself has said that mankind is inherently evil...

No such citation exists.
Lets see if Navros can provide one.