I think a point that everyone is missing is that the incredibly wealthy will have first access to designer babies. Assume that it remains relatively expensive for one generation (10-20 years), this creates a literal visual divide in class, further accelerating prejudice and inequality (it had been shown countless time that the more attractive/taller/more intelligent are more successful). The rich will become then stay attractive/rich and the poor who cant afford genetically engineering will become more and more "unappealing" in comparison, separating humanity. This will literally be the epitome of dystopia