First, I find Pope Francis' statements remarkable, like watching a saint in action. However, the Church, per se, is an embarrassment to the thinking person (at least this thinking person). It reminds me of  the story of the emperor's new clothes-he is naked yet everyone praises him for his wonderful haberdashery. 
        The idea the Church can never change is false. It will change or die. God does not change, and we can be sure what doctrines the Church needs need never change, such as the Trinity, and others directly derived from Scripture. 
         The fascination with natural law, so-called, is not wise. Natural law is not and never was an expression of the Law, meaning the Pentateuch. The law of God is love, evidence for which may be found in the Word of God, spiritually discerned. 
          There is a heresy here, a semi- Pelagianism, a subversive legalism that assumes that we must obey every and all religious laws as invoked by an infallible hierarchy to please God.