We're obligated evangelize as you apparently do in Philly, the "ecumenical spirit" and laziness have neutralized us. Ecumenism undermines our very attempts to bring Catholics back home.
Well, they aren't really Catholics then, are they?
I'm verrrry leery of performing lay-excommunications, that is the specialty of the neo-Catholics.
Not sure what the Bishop is supposed to do, besides granting universal indult of the Tridentine Mass. Overall, though, closing 25% of the Novus Ordo parishes is an excellent start to returning to Tradition. Maybe this is his plan.
People who do not hold the Catholic faith, and know the Church teaches contrary to what they do hold, are not Catholics. Period.
A material heretic is someone who innocently holds a false proposition about the faith, being ignorant of what the Church actually teaches. Someone who is aware the Church condemns women priests or birth control or abortion or divorce, yet continues to hold to this belief in the face of the Church condemning it is a formal heretic. Similarly those who knowingly deny the real presence or the sacrifice of the Mass.
Most fallen away Catholics are formal heretics.
It does no good to go door to door unless God his disposed the people to return. One first needs to pray for lights and grace and an increase of faith for our absent brethren.