I really liked the premise of this, and I'm glad that right from the start, it explicitly described Death dying as being a bad thing. There's something nice and ironic about people not being able to die, but society dying a result of this. The tone was nice and melancholic, and the Bartender's story explored this new world in an enticing way that still left a lot to the imagination, and ripe for further exploration.
Of the two stories, I definitely preferred the Bartender's. The ending which I got had him no longer being alone, and I love the way that it reflected the text used for the previous time skips. It did feel as though the idea of him feeling alone sort of came out of nowhere towards the end, but in retrospect I can see how it fits his characterisation. His story was enjoyable nevertheless (and I'd love to know whether the soldier gets better or not).
The Marauder I was a bit less keen on - there's a lot of mystery around who he is and what he wants, and I didn't feel like I really empathised with him as much as I did the Bartender. Thinking about it, I guess that it's his quest is less relatable - the Bartender's just getting by and doing what he can, whereas the Marauder wanting to kill Life isn't really something attainable in real life. That being said, I feel like he was a bit more engaging in the Bartender's story, for what it's worth.
Overall though, I still felt like you did a good job of committing to the concept, and of exploring both the ramifications of Death dying and of the mindset of the characters that would inhabit such a world, without making things too depressing or dark. Great job!