Am I understanding this correctly? The Friendly Ghost is suggesting that the Church begin to allow Confession in lieu of getting an annulment? Confession would be enough to allow the divorced and remarried to receive communion? Because the person going to confession believes in his heart that his first marriage was invalid?
"That means that for one who converts, forgiveness is possible. If that's true for a murderer, it is also true for an adulterer."
But he misses the obvious (or is he?):
An adulterous husband could murder his wife and then go to confession both for the sins of adultery and murder, each of which are mortal sins.
He can then be in the Church's good graces to marry his adulteress!
The only thing that may stop him is civil law and its penalties, but certainly not Church laws as outlined by Kasper.