So I'm sort of in agreementish about Vera's death but I was definitely WTFing before I read the epilogue bit. However, I can understand it after thinking about it a bit more. She thought she'd survived and the killer was dead, the ordeal was over she just had to wait for a boat off the island, but then she goes to her room and oh shit how could Lombard have done that when she was with him? She's the only person left and the noose and chair were sitting there all suggestively and meanwhile she may still be hunted by an omnipresent invisible killer, she's all alone, and she's already been paranoid and freaked out for several days. The only way to guarantee escape from further psychological torture was to kill herself, I think she was too hysterical and mentally exhausted to consider enduring more of it especially on her own in a house full of corpses.

I did feel that Marston should've been later, but I keep having to remind myself that the order of death was decided by the judge who was arguably a sociopath. Marston might've killed again but not intentionally, unlike most of the others he didn't decide to kill anyone. Emily Brent didn't exactly decide to kill anyone either but she had to have known that a lot of women in that position kill themselves and if she was the devout and pious Christian she claimed to be then she would have done something so I think it was her sanctimonious hypocrisy that separated her from Marston. Armstrong should probably have died first because his was also an accident and one he felt bad about but he was needed by the judge in order to pull off later murders.