Simon didn't deserve it: The show admits that Grace played a big part in how Simon turned out; and while Simon of course has his own agency, Grace getting Salvation because the type of therapy she needed found her and Simon dying in a way he probably feared the most was shitty. They should've both be able to atone and be saved or they should've both burned. Probably my least favorite of the books. Simon didn't reject the chance to change but it was more that what it took to change Grace found her—the train obviously gave them trials before and this was what got to Grace, thinking it Simon, whose issues were different, should've followed suit in the same instance is ludicrous and killing him like that because he couldn't miraculously shake off the decade of brainwashing in ill placed trust is even more so.