Wonderful posts on this thread.
I would like to mention a few things as related to the question originally asked: What is man's role in revival relating to ministry gifts and callings? What I am going to mention is NOT addressing man's role preceding revival, nor man's role OUT OF revival. It focuses on IN REVIVAL. I hope this is clearly said.
Like and with others here, I have sought God on this. So far, the short of it is Phi. 3:12. “Not as though I had already attained, either were already perfect: but I FOLLOW after, if that I may apprehend that for which also I am apprehended of Christ Jesus.” Focus your attention on the word APPREHEND.
Let me explain what I mean. Recall reports in revival the Holy stillness often expressed by those WHO WERE IN LEADERSHIP seeking God for biblical revival, the Work of His Holy Spirit. You have read of their concern to discern and stay out of God's way, and that at times testimony not preaching convicts and delivers what is on God's heart. To go where He goes, say what He says (remember what Jesus said and did?). Leadership changes. We follow after (or we do not).
Part of the Holy Stillness is related to a great increase in the fear of God as the magnitude of His Sovereign Power is in evidence. Just like for Isaiah, the reality is arresting (words of course fail here). With that reality (revelation of reality), faith skyrockets and obedience quickens its pace. Consider for a moment the role of faith.
Now here is the point I am aiming at: real knowledge of God (Phil. 3:10 to know Him) becomes apprehension (actual laying hold of). Paul says it perfectly in Phi. 3:12. In revival Christ/God lays hold of us. Same in salvation: we know He has done this. And there is a THAT FOR WHICH we are laid hold of. The calling you ask about lies right there in the will of God. I know everyone here sees that Paul followed (Phi. 3:4-11) our Lord (Phi. 2: 5-13), humbled perhaps as much as a man can be. And of course Phil. 3:10 precedes 3:12. I am sure you have read how the direction of whole lives are changed (set right) including ministry and callings.
So, What is man's role in revival relating to ministry gifts and callings? I should add, when faith (a gift) skyrockets, and we lay hold of that for which we were apprehended by Jesus Christ, (what to say?) He supplies every good needful thing. In a sense there is nothing for man to do but follow and apprehend, (pressing forward? Respond with amen to God?).
This is the picture I get, what I have witnessed. Never mind my words here. They are just the best I can do at the moment. MEDITATE ON Phi. 3:12