No. Francis cannot replace the teachings transmitted to us by Jesus Christ via the Deposit of Faith with his personal opinions. Such is a schismatic act.
I am a born again believer, but not an expert on RC doctrine. How can one tell is it is "ex cathedra"?
Vatican Radio Report on Francis’ sermon today:
>>One must be docile to the Holy Spirit, said Pope Francis Thursday at Mass in his residence of Casa Santa Marta, and one must not resist Him. Pope Francis warns against those who resist the Spirit with “so-called fidelity to the law” and invites the faithful to pray for the grace of the docility to the Spirit.<<