I was thinking the same thing. Obviously, in most cases, you won't know a OC's plays, but if you know there are going to be 3 deep routes, and you call Cover 1 without a blitz, you're asking for trouble. The fact that the X and Y receivers are running fades means that they'll be down the field pretty quickly after the jam, which means the safety is going to have to commit to one of these receivers rather hastily. He may have a chance to help the post route if he commits to the X receiver, but that's only slight. He'll be no help to anyone else if he has to commit to the Y receiver. More than likely, you're leaving 2 corners, probably the 3rd toughest position to play in football, butt naked to get exposed deep with no help.
Cover 4 works better here, but Cover 3 might be best, assuming there are no adjustments to either.
Oh, and sorry, but I used actual football 'X' and 'Y' terms. Not the corresponding Xbox terms. Hope that doesn't cause confusions