I say this with decisive confidence, as a student of the Scripture, and a disciple of Jesus Christ: authority will pass more and more into the hands of men who have the courage to preach the "whole gospel", which is the New Covenant gospel...
...and it does take courage to preach it...great courage. When you get the chance, ask Paul the Apostle how much courage it takes. The New Covenant is the completion (and replacement) of the Old - and any gospel that gives greater weight to the law is an incomplete, "unbalanced" presentation.
The man who preaches the Finished Work of Christ will bear authority and rule, because all authority flows from the gift of righteousness we have been given. We have no authority based on our own puny, filthy efforts.
The New Covenant man will rule lovingly and modestly, because wrapped up in the revelation of the grace of God, is a revelation of his own falling short, and the manifold power of the atonement.
But make no mistake - the Grace-man will rule. The fact that anyone may disagree with that observation does not make it not so. Hound dogs always howl at the moon, but the moon is unaffected.
These men (and women) will be able to bear authority with a trustworthiness that far exceeds their self-aware antinomian-legalist friends, because they have taken the trouble to educate themselves in the whole gospel.