Of course, as we know from the “original” timeline, Shauna and Keith aren’t meant to be together in all possible worlds any more than Amy and Ryan are. Maybe it’s best just to live in the world as it is rather than in a different world that might have been. There’s no guarantee that either one is “better” than the other, or that one is “right” and the other is “wrong”. They’re just “different”.
Of course, as we know from the “original” timeline, Shauna and Keith aren’t meant to be together in all possible worlds any more than Amy and Ryan are. Maybe it’s best just to live in the world as it is rather than in a different world that might have been. There’s no guarantee that either one is “better” than the other, or that one is “right” and the other is “wrong”. They’re just “different”.