Were your ears buzzing, Animus, since I was referring to your most recent story? In any event, I'lll probably bump this to a whole new post because the thoughts of Intrikate and Lady Songsmith are so interesting. It's not the approach I'm taking -- that Susan might see the others as punished for living in the past while she heeds Aslan's instructions to embrace Spare Oom. As I see it, they all are embracing a life here as instructed, but there is significant difference of opinion as to how to walk that path.
The point though is a very interesting one to consider -- Susan becomes an apostle rather than the apostate. I've never seen Polly, Eustace, and Jill's criticisms in TLB all that much of a hurdle. It's Peter's condemnation that's the problem -- of course in saying it, he doesn't know they are dead yet, so there is some wriggle room there as he does not know fully just how awful that statement is.

Or, and here we're getting into real brain melty territory and reconciling it all in a nice, neat canon-compliant package, Susan is the one doing Aslan's will, the others have to die in order to free her to do what it is she must. It's Part of The Plan. Brutal yes, for her, but for the others, well they are called home to their happily ever after. Aslan kills the others so that Susan is able to pursue what she must, whatever that might be... Cold War Warrior, Revolutionary, Astronaut, Civil Right Activist, Environmentalist, PM of Canada, Bollywood starlet. Gawd there's kind of a Quantum Leap possibility here, isn't there?