He's not redeemable but he still has a right to live

I think the intent in the coke scene is not to show that hansol is freed from his sin, but that despite him having committed many sins for the sake of receiving love or at least approval from the only family he has, that he still has the right and the choice to live and to do that for himself for once without being desperate for love and approval. He never did that ever and he probbably always had the threat of being killed by his father dangling above him. I think he should end up living a normal life and experience the normal boring ways of life. I wouldn't call this a redemption because he could never be freed from his sins, but just a portrayal that overyone has a right to live, even if they're a criminal. Death as punishment or prevention for further crimes should only be the last resort and I do think it would be the right choice for the doctor, but other than his ability to steal the matching rates of guides hansol is just a normal civilian. Without that ability he could be treated like any "middle" (non guide or esper) criminal.