Francis has an extremely small gene pool to fish episcopal candidates from.  Clerics are a homogeneous group, reflective more of institutional indoctrination than intellectual curiosity and unbiased openness.  Seminary training and clerical cloisters form and firm a mindset that is impervious largely to outside influences or ideas.  It is extremely difficult for them to think for themselves, and to act on their own.  Jesus is unique in that he broke out of his Judaic box to think for himself.  Of course, the consequences were deadly.  Hence, any clerics who follows in these footsteps will be person non grata. While F. may be the ultimate headhunter, the heads are predictable.