I have to agree with you on this. I don't know about women's pants from the old Balenciga, but I do have several pairs of pants (both Jeans and dress pants) from Balencagia when NG was still the designer. Those are the best pants I've ever own! The fitting is so great. They really help to shape up your lower body, truly magic.
Obviously, he is not personally stitching it , but the fabric selection and the cutting is AW's hand, I can spot it. I have a pair of NG Balenciaga pants from 2007, there are no weird creases or gaps in the crotch area, and the fabric is of impeccable quality, I cannot say the same for the pants presented here.