Won't be the same to me
I feel the same about William. It won't be the same seeing him in the past. Jack is different because we have only known him in the past.
But I will really miss seeing the relationship grow with William and Randall, and William and Beth. I love how they grew to accept him and he slowly worked himself into the family and how much they all loved him. I will especially miss those scenes with William and Randall and how they came to be so close so quick. Would have loved to see that relationship blossom.