i'd like to think that f&c showing simon dead in every other universe so far is less foreshadowing and more stressing the point of how rare and lucky the situation he's in back in his ooo is. like just being alive there and then is pretty miraculous but he's that and in contact with his daughter (who is alive and happy) and a group of friends who- while they can't fully understand his distress and grief- love him!
Idk maybe it's fine to accept Sada and Turo are just really shitty parents who neglected and abandoned Arven instead of pulling the shortest straws in an attempt to make them seem like they were just sad workaholics who got too caught up in their work like a bad hallmark movie