I don't think there's anything wrong with his walking away, if he feels doing what he did didn't align with his core values. Daval3D kept a tight grip on his assets, so even though it would be quite easy to pick up from where the story left off, it wouldn't be the same visually (though I would be adamant in keeping such works away from CrazyDad, MaxSmeagol, and Pegasus Smith.) At the end of the day, these were Daval3D's stories to tell, and anyone else leading the creative output would be at best a poor imitation, even considering the frustration over the direction he's taken his stories to please a select fringe.