Theodore of Mopsuestia is most definitely venerated by the Assyrian Church of the East. I have met Chaldean Catholic priests who venerate him privately (in fact, one can come across RC writers - pre-Vat II - who regard Theodore of Mopsuestia highly since, during his lifetime, Theodore was regarded as orthodox).
There is a movement to exonerate Nestorius - a document has been found apparently written by him where he affirms that his Christology is the same as that of St Flavian of Constantinople. Diodore of Tarsus, the other “Greek Father” of the Assyrian Church is, according to Fr. Holweck, the “innocent originator of Nestorianism.”
Theodoret of Cyrrhus is listed as a “Blessed” in the Byzantine calendars, both Orthodox and Catholic, and he joins Augustine and Jerome in this categorization. The Old Rite Orthodox tend to use Bl. Theodoret and one particular passage of his which appears to affirm the two-fingered Sign of the Cross.
Alex
