I actualy agree with you that the Spider-wedding was a short-sided mistake and needed to go. However, I think that the way you decided to do it, Peter literally making a deal with the Devil, did far more damage to the character. Surely you could have come up with a way of reversing the marriage that didn't involve condemning Peter's eternal soul to Hell.

Anonymous
Peter is a fictional character, it’s not really going to be a problem for him.