Well no, the healing quickly is one of the perks I rather like.
I'd start it with the point of being able to insert genes resistant to some terrible illnesses. As the article says the girls were apparently given HIV-resistant genes. Perhaps it is a starting point for helping to eradicate things like HIV, cancer, and other debilitating diseases. The trick would be to ensure that these human beings are given an actual life and aren't just used as lab rats, of course.