What minor tweak to a book ending would have vastly improved it?

For example, the end of the Expanse series >!Naomi and Amos seperate from Alex who goes to find his son and family. This didn’t really sit that well with me, as why wouldn’t they just go with him? They return to Sol where Naomi has… nothing left. Alex and the Roci are her family and home. So, the thing I would tweak is having Holden, just before he dies, tell her that while he had all of humanity connected together he noticed Filip alive and well in Sol. Then there is a logical reason for them to split up, to find their respective sons.!<

What’s your example of this?

by Grogusbutt