Has it caused problems or cost an inordinate amount? If not, Trump...pardon me...PRESIDENT Trump wil probably leave it alone.
In that light, I think of it in terms of a police department that has had its sidearms replaced with pop-guns. It won't "cause" any problems or "cost" anything until there comes a time when the lack of a real gun is going to cause a problem and incur a real cost.
As with women on combat ships and in other combat positions in the other services, until we get into a shooting war with a foe that is going to have the resources and will to engage us as peers, it isn't going to cause problems that can't be justified by the desire for social engineering on the part of politicians and flag officers.
When those problems occur, and the costs are incurred, the American public will cry for the the scalps of those who caused the disastrous loss of life and defeat in combat, but those people will be long gone, having grown fat and bloated on the public trough.