To quote Faye: What the ASS?
This last cartoon is seriously risking losing the plot for me. Not because of the outlandish physics, or the difficult exposition.
No, because it's all wrong. This is the ENDING. In the ending, you resolve the questions and plot complications based on the physics and rules you ALREADY set up. You don't start setting up NEW physics and rules.
Not only is it wrong from the writer/reader contract point of view, it's wrong from the 'let's just explain what we just saw' point of view. We just saw Sedna rip her own arm off and bleed out while shivving Church. And we just heard was that at least one of the participants' realities was actually a simulation, and maybe the current one too. The explanation we needed was "How did Sedna just go faster than Church and become stronger than his armor?". An explanation based on the last two things would make sense. What we got was just the opposite of that. Plus Alice using a vague "we" about the ability to violate entropy at will is just...bleah.
FIrst, nothing any of the supersoldiers has done required entropy violation (up to, perhaps, Alice's self-cleaning blood removal). So saying they can do that doesn't really answer much. But it does open up a wildcard that Alice (and whoever else is a "Maxwell's Demon") has weakly godlike abilities and always has. Meaning anything can happen and can have happened if they did it. A plot hole big enough to drive a Praeses through.
Second, it's all totally irrelevant. It doesn't really answer the relationship between Church and Sedna and Alice, or the sudden ability for Sedna to be faster, or the reason the Praeses isn't really nervous about the supersoldiers, or how Ardent and Gavia escaped from a simulation, or the Blink, or the Nightwalker, or anything. It just makes things more complicated and handwavey.
Man I could rant all night about this. However things tie up now, the whole story is suspect!