I think one of the single most compelling non-doctrinal proofs of a very deep and dark intellectual and spiritual perversion is the treatment of traditional catholics versus the treatment given to those who practice all sorts of false religions. The casual N.O. attendee will look with suspicion or even scorn at the traditional Catholic whereas they reserve nothing but gushing praise and admiration for the Buddhist who "prays" for world peace for example. The traditional Catholic is condescendingly pitied while the Muslim is thought to be a "man of God." I have even heard of "catholic" schools hiring non-catholics while firing traditional catholics.
Additionally, I would say that it is precisely this formal "worldliness" that has totally darkened and extinguished the Gifts of the Holy Ghost in the Bishops' minds. It is this rapproachment with the world that strangles the life out of the Church like no other force ever seen since it has the same effects of heresy and schism, but lacks propositional identity. If one is not careful, the mere tolerance of this world-naturalism, coupled with a sentimentality that degenerates even further, or through regular association, one will almost certainly become infected as well. This is no mere common worldiness, this is a kind of spirit that changes "St. John's Catholic Church" into "St. John's Catholic Church and Community Center" thereby reorienting religion itself without ever affirming even one heretical proposition.