Edit: I see Gurney got to the Eastern Catholics before I was done writing my reply. Good summary.
Though of course from an Oriental Orthodox perspective, we have nothing to "return" to as we never left the faith in the first place, but hey...tomato, tomahto, Leo, Nestorius.
If God wills it, it doesn't matter what anyone says, and of course we also pray for an end to the schism. When I read the actual texts of the Eastern Orthodox liturgy, with precious few exceptions that I'm not even sure are liturgical (like calling the Armenians heretics for abstaining from cheese when the EO are still eating it...hahaha; I'll never not find that funny), I don't see anything that we would disagree with. Heck, I don't even see anything that we don't already say. This is why I have hope in our talks with the EO, but less so with others. Check out the priest's confession before the Eucharist in the Coptic liturgy of St. Basil, for instance. I am really simple, but I cannot find fault with any of this, and it is the essence of our faith:
"Amen. Amen. Amen. I believe, I believe, I believe and confess to the last breath, that this is the life-giving body that your only-begotten Son, our Lord, God and Savior Jesus Christ took from our lady, the lady of us all, the holy Theotokos Saint Mary. He made it one with his divinity without mingling, without confusion and without alteration. He witnessed the good confession before Pontius Pilate. He gave it up for us upon the holy wood of the cross, of his own will, for us all. Truly I believe that his divinity parted not from his humanity for a single moment nor a twinkling of an eye. Given for us for salvation, remission of sins and eternal life to those who partake of him. I believe, I believe, I believe that this is so in truth. Amen."
</damnable non-Chalcedonian soapbox>