What about Christ's walking on water? "For to run upon the sea is foreign to the human nature, but it is not proper to the divine nature to use bodily feet. Therefore that action is of the incarnate Word, to whom belongs at the same time divine character and human, indivisibly." - St Severus of Antioch
I know that he's not an EO saint but I feel that this fits in with the subject.
For to be omnipresent is foreign to the human nature, but it is not proper to the divine nature to be circumscribed. If the Word can walk on water and read the hearts of man, why can't He be present in more than one place? After the union His divinity is not to be separated from His flesh.
Nestorians divide the divinity from the flesh. Also, it is believed that St Ignatius is speaking of the Gnostics in this following quote; they deny Christ had true flesh.
"They abstain from the Eucharist and from prayer, because they confess not the Eucharist to be the flesh of our Saviour Jesus Christ, which suffered for our sins, and which the Father, of His goodness, raised up again." - St Ignatius of Antioch, Epistle to Smyrnaeans, 7,1
The spiritual presence of the Eucharist is either Nestorian, Gnostic, or some other heresy.