The moment the Marines are required to do something that is likely to involve heavy casualties the women will be withdrawn first.
Not because of performance concerns, but because the nation won’t tolerate large numbers of young women killed or maimed.
And then those Marines will be in even more danger, unless, as some us believe, those women were merely placeholders anyway. Of course, what will make the difference is whether the male Marines were able to prepare under that assumption (whether overtly or covertly).