There were seven real churches in Asia Minor. This fact alone in no way supports the notion that the churches somehow represent distinct and identifiable dispensations within the so-called church age. That is pure dispensational allegorizing.
What do you suppose the Jews are going to find when they go looking for food?
Nothing, since the church will be gone according to the dispensational theory.
According to the Bible and contra dispensationalism, the Church will be preserved until Christ returns at the Second Coming. It will hold forth the truth of the gospel to all nations until the end.
What criteria do you use to determine if a passage of scripture is an allegory? The Lord is my Shepherd. I see two allegories here. Shepherd and sheep. If we see the meaning of the allegory in this passage, is it the same elsewhere?