Not thrilled with either option, since the whole point originally was to put a fine point on the idea that Dead is Dead, you're not coming back. I always suspected that the real reason Orpheus was told not to look back was because Hades knew that humans in general have a habit of doing exactly what they're told NOT to do, so there was unlikely to ever be a danger that he'd have to relinquish Eurydice to the living world again once Hades told Orpheus not to look back--he knew that Orpheus would screw up and that would be that. If there were any change to the story at all, it seems that the obvious one would be for Orpheus to also get stuck in Hades because he couldn't follow simple instructions, and have to endure an eternity of Eurydice telling him not to do things and then laughing at him when he did them anyway and horrible things happened as a result.