http://edition.cnn.com/2016/12/15/health/babies-three-people-embryos/index.html
Where to draw a border between advanced medical cure and abusing ethics has long been an issue.
Though genetic control of animals has been done since long time ago to produce more delicious food or faster racehorse, genetic control of human has quite a short history.
I think that curing disease genetically is acceptable, because it's nothing to do with his/her personal character nor figure.
But, reforming his/her ability or figure genetically will lead to the trend that everyone bears the children who have the same face, figure ,and talent.
It's awesome.
