Sorry to hear that he is giving up on the restoration process, but that doesn't mean that God can't restore him, at least as far as his relationship with the Father is concerned. I don't think he should ever be in a leadership position again, however.
Well, if he had followed through with the process (5yrs, no return to the pulpit) I think he could have pulled out of his personal wilderness.
But alas, the last I heard about him, he had left recovery and was claiming that he did not need it.