I am ever intrigued by the amount of people trying their hardest to churn out theories that absolve Hydaelyn whilst portraying Zodiark as an inherently evil being. Nothing we know so far suggests that Zodiark did anything more or less than what was asked of him after a bunch of Ancients willingly sacrificed themselves to summon him twice. As for tempering? Ramuh tells us that it isn't necessarily a voluntary action. Is it really that difficult to accept that things might not be so black and white?