I disagree; I think what those guys mean by NT prophecy is that ‘a word from God’ can be mixed with error or can be error altogether, even from someone who has a supposed gift of prophecy. But there’s no hint of that in the accounts in Acts where Agabus and Phillip’s daughters are called prophets (and who prophesied), or in the accounts of Anna and Simeon.But you don't know that.
But let's suppose you are right. In some ways, that is exactly what guys like Moreland, Carson, and others mean by prophecy. No one is saying--excluding the Benny Hinn types--that new doctrine, new revelation, new ethics are being added.
What they’re promoting is something that doesn’t exist in the Bible; except maybe there were some in Corinth who were trying the prophecy thing out and Paul had to say to them, “If anyone thinks himself to be a prophet or spiritual, let him acknowledge that the things which I write to you are the commandments of the Lord.”