A mystagogy of EP IV needs to point out that the early church or a patristic typological interpretation of OT passages can be problematic for contemporary interfaith sensibilities. Appreciation of the prayer does need to carry with it a certain note of caution concerning its appropriation of Jewish salvation history. In other words, contemporary exegesis of OT texts lets the Hebrew Scriptures stand on their own terms. That being said, the biblical approach of EP IV can be valued and appreciated on its own terms as long as one is aware of the contemporary critique. It is important to note that the NT texts themselves often approach the Hebrew Scriptures typologically. (A Commentary on the Order of Mass of The Roman Missal: A New English Translation, pp. 427-428)While contemporary interfaith sensibilities might justly govern interfaith activities, there is no need to abandon the scriptural tradition of the Church in reading the Old Testament in light of the revelation of Jesus Christ. Yes, this is not just an "early church" tradition (as in going back to, say, St. Ignatius of Antioch), it is a scriptural Church tradition: the evangelists did it, the apostles did it, John the Baptist did it, and Jesus Himself did it. I see no reason to avoid typological interpretation of the Bible in a mystagogical context.
Perhaps this will come off sounding insensitive, but do we risk losing parts of our authentic Catholic identity, to use a Johannine phrase, "for fear of the Jews"?