Actually, what he said was this:
“About the problem of Communion to those persons in a second union, that the divorced might participate in Communion, there is no problem. When they are in a second union, they can’t.”
Seems pretty clear to me.
He goes on to say:
“I believe that it is necessary to keep this within the entirety of pastoral care of marriage. And for this it is a problem. But also... a parenthesis, the Orthodox have a different praxis. They follow the theology of economy, as they called it, and they give a second chance, they allow it. But I believe that this problem, and I close the parenthesis, must be studied in the framework of marriage pastoral ministry.”
It is a problem. A real problem. What happens when a person divorces and remarries, and then realizes with clarity of conscience how wrong it is? They wish to receive all of the sacraments, but are precluded. I think he is right to recognize it, and be willing to talk about it.
Yes, of course, mortal sin is always a real problem. That doesn't mean the Church should encourage such sinners to be comfortable in their sins.