Personally, I'm desperately hoping for a near-term Gattaca solution, by which ordinary or defective parents can, by genetic engineering, cheaply optimize their children's tendencies towards all good things, at least as determined by genotype, including ethical behavior and competence, in one generation. Screw this grossly inefficient and natural selection nonsense.
I know the movie presented this as a dystopia, in which the elite were apparently chosen mostly to be tall and good-looking. Ethan Hawke's character, born naturally, was short and was supposedly ugly. Only in the movies, Ethan. But he had gumption and grit and character, which (in the movie) had no genetic component, enabling him to beat out all his supposed superiors. I call shenanigans on that philosophy. I suspect that gumption and grit and character do have a genetic component, which I would wish my own descendants to have.
I am also hoping that all parents in the future have the ability to make intentional genetic improvements to their children, and I also agree with you that this would not necessarily result in some horrible dystopia. It might actually result in more diversity because you wouldn't have to wait for a mutation in order to add something new. I wonder if anyone has considered that. I doubt that this would solve all the problems in one generation. Some people would be against genetic enhancement and we'd have to wait for their children to grow up and decide ...
If it's worth saying, but not worth its own post, even in Discussion, it goes here.