This whole argument is based on conjecture. Did Eusebius really mean that
Matthew 28:19 omitted the traditional ending? No, but was emphasizing the true meaning of the verse. As One God Apostolics the traditional ending is more important to us than to the Trinitarian. Because it doesn't just say in His name. But that it shows the Father, the Son, and the Holy Ghost all being one in the same. Also those who believe that Matthew was originally penned in Hebrew not only to bring doubt to Matthew but to the whole New Testament.