Susan asks an excellent question in Neil Gaiman's "The Problem of Susan" -- Why does she need "redemption"?I'm pretty sure that's the case,The rest of the family entered the new Narnia because they all died in the train accident while Susan remained alive because she wasn't with them thus giving her the chance at "redemption"
If Aslan killed her family to teach her a lesson -- which is, perhaps, the most charitable reading of The Last Battle -- then how does that make him worthy of being a god and worthy of worship?