Stuartal, the Church as you say, " still firmly proclaims that marriage is indissoluble." The Pope, however, seems to be saying that those who are divorced and remarried without annulment can be full members of the Church and receive the Sacrament of Penance if their confessor deems that it is 'impossible' for them to live in continence. There was a time in my much younger days when I fell into this category.
This means in practice that all of us who find it 'impossible' to live within the constraints of the divine moral law can with the connivance of a confessor ignore it with absolute impunity. Some behaviours may well be against the 'civil' law and transgressors subject to 'civil' penalties but they may not be morally responsible for that behaviour if their confessor agrees.
This is what the message of Amoris Laetitia seems to be saying. Although confined in this instance to Communion for the divorced and remarried it can be extrapolated to cover any moral dilemma.