The Eucharist, although it is the fullness of sacramental life, is not a prize for the perfect but a powerful medicine and nourishment for the weak.—Pope Francis, Evangelium Gaudium.
So then, who are "the weak" of whom the Holy Father speaks? They are the repentant sinners who turn to Christ seeking His mercy and forgiveness.
The Holy Father has chosen to speak in a more gentle manner to sinners. That is a good thing. Sadly, we can see/read all too clearly that an invitation to sinners is a thing easily warped by media-types whose main concern is the sale of the news and the attainment of profit.
Perhaps the Holy Father's approach, which tends to do what most commercial advertisements do—i.e., start with a positive image of a product then end with a rapid firing of the disclaimers, exceptions, etc.—should include an obvious reference to the Church's Tradition to help better contextualize his comments.
No doubt, upon hearing the new language of mercy some will take a hard look at themselves and come to the realization their lives are miserable and that the Church's message offers a much better alternative to their life of despair. Others, cemented by pride into their obstinately sinful lifestyles, will mock the Church and deride the Good News of salvation.
If we believe the surveys, far too many Catholics practice artificial contraception, intentionally or at least as weak Catholics, in defiance of Church teaching. Those willfully defiant individuals who could care less about the Church's teaching and who behave like petulant teenagers might do well to 1) stop calling themselves Catholics and 2) stop receiving Holy Communion.
Whoever, therefore, eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of profaning the body and blood of the Lord. Let a man examine himself, and so eat of the bread and drink of the cup. For any one who eats and drinks without discerning the body eats and drinks judgment upon himself.—Letter of Saint Paul to the 1 Corinthians 11:27-29