The revelation of Mariner's connection to Sito Jaxa makes the past four episodes make sense - Mariner led Delta shift, who treated the entire incident as a game to one-up Mariner and Beta shift, and was so spooked by the events that she went self-destructive. It also explains her immediately trying to throw her life away to get the moopsy out of the control room in "I Have No Bones Yet I Must Flee"—she saw no way to get the moopsy out that didn't involve the bait having their bones slurped up, causing her to decide "I'll be the bait" because she couldn't bear seeing Ransom or Gary die because PTSD.
Mariner hearing about T'Lyn being on the Vulcan cruiser that saved the Cerritos from the Pakleds and Ma'ah's former captain, despite already learning this a few episodes earlier are a shout out to the Star Trek habit of leaving out things a previous series did, like TNG not comparing Nigilum's trap to the space amoeba from TOS.
Fridge Logic
When speaking with Mariner about the Dominion War, Ma'ah laments that he did not have the opportunity to take part. Which seems strange as he and Mariner at least appear to be about the same age. One would think the Klingon Empire would have no problem in recruiting someone like Ma'ah to take part in such a devastating interstellar war.
If Worf's son Alexander is any indication, Klingons mature much more rapidly than humans. Ma'ah might have been born shortly before the war started and became an adult just after its end.
