Civilization games like Civilization 6 even especially possible future upcoming Civilization 7 should learn from Mohawk Game's Old World civilization type game in having multigenerational(dynasty/dynasties) character aging. But in very extremely complex very extremely in-depth detailed gradual aging.
And the Civilization's traditional immortal characters should be kept with the various individual civilizations individual pantheon's individual dieties goddesses and gods.
And the Civilization's traditional immortal characters should be kept with the various individual civilizations individual pantheon's individual dieties goddesses and gods.