If they believe as we do, all they have to do is recite the Nicene Creed (they, unlike Catholics, don't even have to be chrismated)! It's as simple as that.
So, there is no need for rationalizing, and re-writing their fals Christology to try to make it appear Orthodox.
The only reason they do is their goal of re-entering the Church by deception and not by renouncing, clearly and unequivocally, their false beliefs.
This is obvious from the fact that they steadfastly refuse to recognize Chaledon, and until such time their smokescreens nothwithstanding any discussion is superfluous.
WOULD that be all they need to do?
Either way i think any union without them reciting the creed is a false one as you said.
The article by the coptic priest tried to say it was political which is a red flag right there. The 7 Councils stand. They were not political charades regardless of whether the accusation comes from a Copt or a protestant..