That's an interesting point. But remember that not all Christians see Christ in all the OT prophecies. Some of them still still animal sacrifices, a Levitical priesthood, and a physical national of Israel in His place.
One could easily come away with a literalist interpretation of Ezekiel 40-48 if you ignore Christ and the rest of the NT. (Not to mention the fact that you have to read into the passage contingencies such that the animal sacrifices are merely "memorials" even though it doe snot say that in the text.)
In fact, this is precisely what the apostate Jews of Jesus day did. They would not believe He was the Messiah of Israel because they were looking for a physical kingdom based on a "literal" reading of the OT. They had a faulty interpretive grid though which they were filtering their information. Jesus would have nothing to do with their resulting faulty expectations.
Dispensationalism has a similar faulty interpretive grid, and thus it is just Jewish fables writ large.
I never did understand how one could say that animal sacrifices would be re-instituted when animal sacrifices, according to the book of Hebrews, clearly state that they never DID remove sin, so what would be the point? I suppose it is some twisted way of trying to separate God's Church from the People of God of the Old Testament.
Anyway, take care.
Regards