I think you're too conservative. CRISPR. All the talk is about designer babies, I think we are going to end up being able to rewrite our code after conception, also.
True. There are actually very few diseases you'd need to fix in the germ line. You can apply CRISPR to partially specialized stem cells in most cases. As far as complex features like intelligence or good looks go, we're going to be better off just choosing our partners (or donors) than gene editing because we'd have to understand and modify the genome in too many places to make it worthwhile.
My prediction is that designer babies are going to be mostly improved for health (getting rid of hereditary diseases) and superficial modifications like hair color and skin pigmentation.
Genetic diseases will come first, but I'm more talking about actual enhancements.
I think we are a long way off from that. CRISPR isn't perfect and we don't know the rate of failure that its use might cause yet. I think the issue at hand that we need to fix in our regulation is plain old selective IVF. That is, using genetic mapping and possibly AI analysis on multiple zygotes or fertilized eggs to choose the "best" possible offspring. This way you can't create supermen, but you can weed out undesirable traits from one parent, and possibly ensure good overall health. I think this kind of designer babies should become the norm for everyone, not just the super rich.
When we get CRISPR working, we could improve on that. But it doesn't make sense to do very complex enhancements with CRISPR. If you need to edit hundreds or thousands of places in the DNA, the possibility for errors also increases, and at some point it's just not worth it. Besides I think people will want to have offspring that has their own DNA, instead of just cutting and pasting features from a catalog. They just want the best possible combination of that DNA.