CJ's birth certainly made Ashton and Aria's world more colorful. Each day that passed made them feel satisfied with their current lives. The fact that they're able to act like a normal family was a blessing, and this was because of the peace that's been established in the world. Making all their efforts worth it.
Due to the specialties of his birth, CJ wasn't an ordinary child. Well, that's to be expected since he's not just the son of a Spirit Empress but also the son of the Strongest White Mage that has ever walked this earth.
Aria delayed CJ's birth for almost an entire year, in the time frame, the child's growth was inhibited but that doesn't necessarily mean that it harmed him. If anything, that delay caused CJ's entire being to be nurtured more than the norm.