If a couple produces 50 zygotes togather, and the mother and father test all of them, and pick the one that sounds like it has the most appealing traits that a couple might envision together, and discard the rest, would that count as "design"?
This process sounds like it's half a step away from that. The half-step being that they only mention testing the parents, and then the process permits a degree of hypothesizing about possible children. Meanwhile, how hard would it be to test an embryo in utero, and then make a shallow, superficial decision about the pregnancy?
The process is practical and ethical, when considering it's utility for assessing the risk of inherited, incurable diseases tied to varying combinations of dominant or recessive genes, but it's a flimsy assumption that it will solely be used for only those scenarios.
There will be couples with known risk factors, who will want to roll the dice and try anyway, because they love eachother and want a family, and then they check their pregnancy in utero for things like downs syndrome. But then, if you have the options in front of you, why not check out other characteristics too?
And then, if couple A was allowed to do that, and this is a business, after all... Why not couple B? This couple who has no life threatening conditions or genetic combinations, but has the money, and the confidentialitiy of protected health information laws shrouding their decisions in secrecy.
In 20 years, don't be surprised when a certain cross-section of humanity suddenly looks strikingly different, but without any obvious explanation.