Ok, so why don't you agree?
Because we know heretics, schismatics, apostates (according to innumerable Papal pronouncements), and also excommunicati (according to at least the Catechism of Trent), are not members of the Church.
We know that the sin of Heresy separates one from the Church.
We know the Church to be a Body, comprised of members.
We know that outside of the Church there is absolutely no Salvation.
We know that to be a member Faith, whole and inviolate, is necessary.
We know, Faith is necessary for Salvation.
So, he cannot possibly be correct, regarding both claims:
-excommunicati,
including heretics are still members of the Church
-excommunicati,
including heretics, if absolved, are saved
For starters.
And the correct interpretation of the Canonical provision has to be one in line with the truths above.
In fact, I advanced several in the course of the thread.