I will say amen to this. This was my point in saying it is too early for a council to harmonize our differences. But we could stop calling each other heretics (and mean it) and recognize that we are both orthodox according to our own theological languages. With that then there would be no reason we could not once again celebrate the liturgy together. Let another generation, and God in his own time, resolve the theological disputes. As for the "bureaucratic and legal niceties", let each patriarchate run its own house.
Because to us your Filioque is not just a canonical offense; it is a theological statement that the Church did not determine to be canonical. Speculated, yes, but not celbrated. And, because it involves the very pinnacle of our Faith, and because it is a corruption of our statement of faith, it expresses something other than our Faith. And until we profess and believe in one and the same thing we cannot be in spiritual communion and concelebrate together.
That certainly sounds reasonable.
With that then there would be no reason we could not once again celebrate the liturgy together.
But there's a problem. So long as dogmatic differences exist, we are not united in faith and discipline.
Can you imagine how the tension level would rise in every liturgy as the words "Who proceeds from the Father" are spoken?