Huh?
It is sometimes very annoying talking with you because you criticize my posts as "not sufficiently substantiated" (and imply I am not "well informed") by launching some bizarre piece of exegesis out of left field that hardly has much to do with my post in the first place.
1. Rather than respond to my specific points, you just point to your own arbitary OT exegesis, regard it as something that is really in the OT waiting to be discovered (e.g. employing the same circular type-antitype thinking that has no place in critical analysis), and somehow relate this vaguely to something I wrote without clearly explaining what it has to do with any of my points. Saying "Sorry, the NT references to the Messiah are well-founded in the OT tradition" and "NT references to OT ritual related to Christ" just leaves me confused, because I don't see how these vague statements refer to what I actually wrote.
2. In this thread, I talked about the prayers of thanksgiving associated with the Jewish-Christian practice of the Eucharist (which had nothing to do with the transubstantionary theme of the bread and wine being Jesus' flesh and blood), and how these relate to the bread and wine motifs in the synoptic sapiential tradition (which again do not construe them as being Jesus' flesh and blood), plus the Philonic concept behind Jesus as the manna from heaven. How is this not "sufficiently substantiated"?
3. Plus, as I already explained in another thread, the Eucharist is not derived from the Passover itself but most likely modifies the type of sabbatical (and pre-Passover) meal that was common in Pharisaic Judaism, which included the serving of bread and wine with thanksgiving, and the main change (as attested in the Didache) was that the benedictions were changed to refer to the gospel message of Jesus and the gathering of the church. Even if the Eucharist has anything to do with the OT exegetical tradition of the early church (e.g. viewing Jesus as the paschal lamb), your particular interpretation is not that of the NT writers. You are not entitled to argue that your particular interpretation is really there in the OT, as a real prophecy of a second coming (referring to, guess who, but yourself, JCanon), that can then be used as proof to argue against what certain early Christians said the bread and wine symbolized. I would even say that there is no one true meaning; the sacraments meant whatever they meant to each respective group.
4. Finally, I never said the Eucharist was "late" (if this is what you mean by "NT references to an OT ritual related to Christ"). I view it as a smooth continuation of a pre-Christian practice. What I view as later relative to the Didache interpretation of the bread and wine is the consumption motif of the bread and wine being Jesus' flesh and blood, since the Didache interpretation fits much better overall with what bread and wine symbolized in the synoptic tradition, as well as the Great Commission theme, and stands between that of traditional Jewish benedictions and the transubstantiationary theme of Paul. But it is by no means late in absolute terms, if we accept Paul (as I do) as the oldest Christian documents we possess.