Ah, now there's an interesting take on it. While Dagon would approve of Alduin's nature, you have to remember that back before the Dragon War, Alduin, the other dragons, and the dragon cult ruled with an iron fist. Mehrunes Dagon, the Daedric prince of Change, Revolution and Destruction, wouldn't approve of such heavy rule. He prefers the world in its original state: chaotic and ever changing, just like his domain.
Ah, now there's an interesting take on it. While Dagon would approve of Alduin's nature, you have to remember that back before the Dragon War, Alduin, the other dragons, and the dragon cult ruled with an iron fist. Mehrunes Dagon, the Daedric prince of Change, Revolution and Destruction, wouldn't approve of such heavy rule. He prefers the world in its original state: chaotic and ever changing, just like his domain.