I have a read a bit of the main article at egodeath.com as you suggested. I can assure you that nothing there has anything to do with the teaching of Eastern Orthodox Church. It is one big misinterpretation at best or a clever deception at worst.

I see where you are pointing at - there is one big section at egodeath.com full of articles "proving" that historical Jesus never existed. Well, it's a lie. Just look at wikipedia and see that there is a near universal consensus among scientists that historical Jesus did actually exist. Searching for "hidden messages", but denying historicity is a sure way to mislead people, which egodeath.com seems to do a lot.

Well, what is the goal of your personal spiritual development? To find a mental construct that looks good, or to actually find the truth? If it's the former, then any sweet lie will suffice. But if you actually want to know the truth, then egodeath.com will not satisfy your needs.

Correct! Look at the following passage from Revelation 21:1-5:

After resurrection, God will create a completely new universe - even the current Heaven will be destroyed.

The one does not contradict the other  Resurrection means both the attainment of new universe and bodies and, simultaneously, the transcendence of our current physical reality and a complete rejection of our attachments: greed, pride, envy etc.