I've finally found some decent writing by a Roman Catholic Theologian whom Pope Benedict XVI called "the most learned man in Europe", and who was a Cardinal of the Church. Most importantly Hans Urs Von Balthasar makes it sound like the Cross actually accomplished something! Obviously this illicited charges of heresy as he believed something as revolutionary to Catholicism as "for us men and for our salvation he became man...[and] was crucified"... it's not like we say that every week in the Nicene Creed...
On the Crucifixion he writes:
"But we can still ask why this particular murder, after so many others, should be the conclusive event of world history, the advent of the end time? Men have cast their guilt onto many innocent scapegoats; why did this particular bearer of sins bring about a change in the world as a whole?
The crucial thing is that there is Someone who is both ready and able to take their guilt upon himself. None of the other scapegoats was able to do this. According to the New Testament understanding, the Son of God became man in order to take this guilt upon himself. He lived with a view to the “hour” that awaited him at the end of his earthly existence, with a view to the terrible baptism with which he would have to be baptized, as he says. This “hour” would see him chained and brought to trial not merely outwardly; it would not only tear his body to pieces with scourges and nail it to the wood but also penetrate into his very soul, his spirit, his most intimate relationship with God, his Father. It would fill everything with desolation and the mortal fear of having been forsaken—as it were, with a totally alien, hostile and deadly poisonous substance that would block his every access to the source from which he lived.
It is in the horror of this darkness, of this emptiness and alienation from God, that the words on the Mount of Olives are spoken: “My Father, if it be possible, let this cup pass from me. ” The cup of which he here speaks is well known in the Old Testament: it is the cup full of God’s anger and wrath, which sinners must drink to the dregs; often it is threatened or forced upon unfaithful Jerusalem or enemy peoples like Babylon. The cry from the Cross is uttered out of the same horror of spiritual blackness, the cry asking why God has forsaken this tortured man. The man who cries out knows only that he is forsaken; in this darkness he no longer knows why. He is not permitted to know why, for the idea that the darkness he is undergoing might be on behalf of others would constitute a certain comfort; it would give him a ray of light. No such comfort can be granted him now, for the issue, in absolute seriousness, is that of purifying the relationship between God and the guilty world.
The man who endures this night is the Innocent One. No one else could effectively undergo it on behalf of others. What ordinary or extraordinary man would even have enough room in himself to accommodate the world’s guilt? Only someone who is a partner of the eternal Father, distinct from him and yet divine, that is, the Son who, man that he is, is also God, can have such capacity within him.
Here we are faced with a bottomless mystery, for in fact there is an immense difference between the generating womb in God the Father and the generated fruit, the Son, although both are one God in the Holy Spirit. Nowadays many theologians say, quite rightly, that it is precisely at the Cross that this difference becomes clearly manifest: at this precise point the mystery of the divine Trinity is fully proclaimed. The distance is so great—for in God everything is infinite—that there is room in it for all the alienation and sin of the world; the Son can draw all this into his relationship with the Father without any danger of it harming or altering the mutual eternal love between Father and Son in the Holy Spirit. Sin is burnt up, as it were, in the fire of this love, for God, as Scripture says, is a consuming fire that will not tolerate anything impure but must burn it away.
Jesus, the Crucified, endures our inner darkness and estrangement from God, and he does so in our place. It is all the more painful for him, the less he has merited it. As we have already said, there is nothing familiar about it to him: it is utterly alien and full of horror. Indeed, he suffers more deeply than an ordinary man is capable of suffering, even were he condemned and rejected by God, because only the incarnate Son knows who the Father really is and what it means to be deprived of him, to have lost him (to all appearances) forever. It is meaningless to call this suffering “hell”, for there is no hatred of God in Jesus, only a pain that is deeper and more timeless than the ordinary man could endure either in his lifetime or after his death.
Nor can we say that God the Father “punishes” his suffering Son in our place. It is not a question of punishment, for the work accomplished here between Father and Son with the cooperation of the Holy Spirit is utter love, the purest love possible; so, too, it is a work of the purest spontaneity, from the Son’s side as from the side of Father and Spirit. God’s love is so rich that it can also assume this form of darkness, out of love for our dark world.
What, then, can we do? “Now from the sixth hour there was darkness over all the land until the ninth hour.” It was as if the cosmos sensed that something decisive was going on here, as if it were participating in the darkness invading the soul of Christ. For our part, we do not need to experience this darkening, for we are already estranged and dark enough. It would suffice if we held onto our faith in a world that has become dark all around us; it would be enough for us to be convinced that all inner light, all inner joy and security, all trust in life owes its existence to the darkness of Golgotha and never to forget to give God thanks for it.
At the very periphery of this thanksgiving to God, it is legitimate to ask that, if God permits it, we may help the Lord to bear a tiny particle of the suffering of the Cross, of his inner anxiety and darkness, if it will contribute to reconciling the world with God. Jesus himself says that it is possible to help him bear it when he challenges us to take up our cross daily. Paul says the same in affirming that he suffers that portion of the Cross that Christ has reserved for him and for other Christians. When life is hard and apparently hopeless, we can be confident that this darkness of ours can be taken up into the great darkness of redemption through which the light of Easter dawns. And when what is required of us seems too burdensome, when the pains become unbearable and the fate we are asked to accept seems simply meaningless—then we have come very close to the man nailed on the Cross at the Place of the Skull, for he has already undergone this on our behalf and, moreover, in unimaginable intensity. When surrounded by apparent meaninglessness, therefore, we cannot ask to be given a calming sense of meaning; all we can do is wait and endure, quite still, like the Crucified, not seeing anything, facing the dark abyss of death. Beyond this abyss there waits for us something that, at present, we cannot see (nor can we even manage to regard it as true), namely, a further abyss of light in which all the world’s pain is treasured and cherished in the ever-open heart of God. Then we shall be allowed, like the Apostle Thomas, to put our hand into this gaping wound; feeling it, we shall realize in a very bodily way that God’s love transcends all human senses, and with the disciple we shall pray: “My Lord and my God.” - Hans Urs von Balthasar, "You Crown the Year With Your Goodness: Sermons Through the Liturgical Year"