With Muller gone, there is a new reality in the CDF
Pope Francis’ action in not confirming Cardinal Muller as head of the Congregation for the Doctrine of the Faith, effectively sacking him, is, in my view, probably the most significant action he has taken since he assumed office. Muller is only 69, young by Vatican standards, and under normal circumstances he would have been confirmed in his position for another five years at least.
So, clearly, Francis, by this action, is making it clear that he does not approve of the way Muller was doing his job.