I can add the view of Judaism:
The world was created for us to work on and improve, we get "raw materials" and we are commanded to use them and make better, more sophisticated things with them. so the basic answer to such a question will be: Yes' given the chance to repair DNA damage and "fix" heredity defects - we MUST act and use whatever technologies science allows us.
But! on top of that, there are many more points to consider - don't we need to be wary of a snow-ball effect that will escalate to people choosing the "perfect child" in a "child generation store", or will the rich only have access to those services? is there a red line? will we change eye color, height etc... in order with the parents fancy - say, if they want their child to be a basketball player, should we allow them make him genetically inherited high? isn't it like forcing the child to become something he might just don't want?

Be sure - the train leaved the station already - as a Med student I can tell you experiments in this topic are going full steam in laboratories all over the world, including my campus.

but still - this is a question that will need a committee philosophers, scientists, ethic professionals, religious leaders and probably more I can't recall right now, the technology exists and advances - but implementing it to humans in a big scale will need authorities from governments and that's where such committees can enter the game.