Obviously it would be regulated differently in the US to what we would have here.
Although I still don't oppose highly regulated GS I think I've come to a conclusion on how I *think* I would be comfortable with it.
Microsort ONLY to increase chances of a preferred gender but not PGD to determine the gender. Only being restricted to a specific number of Microsort cycles.
IVF/ICSI the sorted sperm for infertile couples with multiple failed full cycles NOT transfers. I'm unsure where you draw that line. IUI only for fertile couples seeking a specific gender (after say, 3 of the opposite, not for a 'pigeon pair') also with a limited number of attempts.
Of course, counselling would be a must for anyone doing it to determine any underlying issues, potential future disappointment (LGBTI for example) and how to deal with the children already born as there is a chance that they may feel like they were never good enough being the gender they are...... I could probably poor a lot more thought into it but my newborn and toddler have turned my brain to mush today.