I understand what you are saying.
Further, a NT prophet does not differ much from an OT one. When the OT prophets preached, prophecied, exhorted of a coming deliverer, judge, priest, King, Prophet, Branch, and Messiah, they were inspired by the Spirit of God.
This same Spirit of God provides inspiration for NT prophets to preach the bulls eye, big middle, and focal point of the entire Bible, the Lord Jesus Christ.
We have many prophetic "topics" today that imo, are way off the mark that Paul called the high calling of God in CHRIST JESUS. There are far too many people claiming the role of an apostolic prophet that use C.I. Scofield, John Maxwell, John McArthur, 7th Day Adventist power point presentations or Hagee for their eschatalogical references.
The role of a NT prophet is to preach the same Jesus that those in the OT did, imo. God is the same yesterday, today and forever.
He walked with Adam, spoke through the bush to Moses, provided a sacrifice for Abraham, anointed David and caused Zechariah to prophesy of that One who would enter Jerusalem on the foal of an ass.
We spend so much time chasing "signs" that we've forgotten that Jesus said the only sign that would be given would be the sign of the prophet Jonah, which was fulfilled completely in the death, burial and resurrection.
The gift of a prophet is not about preaching world events confirming Matthew 24, imo, but about the seed of Judah,
Ge..49:10
The sceptre shall not depart from Judah, nor a lawgiver from between his feet, until Shiloh come; and unto him shall the gathering of the people be 
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