He went directly from Galaxy Level to Single Universe level. Even becoming something akin to the World Will of a world by replacing the will of Heaven with one's own could not erase the shock brought by stepping directly into the Single Universe level.
The reason Su Yunqing had previously believed Bai Xuan should choose to raise the World Level was simply because doing so could indirectly raise Bai Xuan's upper limit. If he chose to strengthen [Nature Authority] or increase the growth progress of the [Child of the Azure Sky] Status, then even strengthening [Nature Authority] could raise Bai Xuan's potential—but not nearly as much as directly raising the World Level.
To Su Yunqing, it felt like trading potential for power, and in her eyes, that was absolutely not worthwhile. There was no need to damage one's potential for a temporary increase in strength.
After all, there were no enemies in Bai Xuan's world capable of threatening the entire world. He himself was the strongest existence in his world. Given enough time, he would naturally obtain that strength.
But now, after reading Bai Xuan's explanation, Su Yunqing suddenly felt that raising the World Level did not seem all that appealing anymore.
Not to mention that, due to the [Child of the Azure Sky] Status, Bai Xuan and his world had already become completely bound together. If he truly one day reached the limit his world could bear, then the world would not restrict his growth because of it. On the contrary, his growth would drive the world's growth.
Just the appeal of choosing to raise the growth progress of the [Child of the Azure Sky] Status to 100%, allowing him to step into the Single Universe level in one leap, far surpassed the impression that raising the World Level