Admittedly, I don't have much truly insightful to impart, just a few oddball observations.
1. It used to be the "mystery" about the Doctor was that the companions and other characters asked, summed up as, "Doctor, who are you?" But the "take" with this production era has been inverted, with the Docor asking herself, "Who am I?" Is the notion, divorced of the actual execution, a valid approach? Meh, don't look at me, I'm the kind of "schlubby" fan who will put up with almost any material involving a space/time traveling call station piloted (more or less) by an eccentric brainiac with a British Isles accent.
2. Somebody joked about a Mac Book based computer virus up-thread, but I honestly thought that was probably how the Sontarans got the Lupari. They somehow overrode their ships' systems and "blew" the airlocks en masse to "space" the "space puppers".
3. How much, if really, anything was Chibnall forced to "describe" rather than "show" due to budget cuts and the number of episodes reduced? I mean, did he originally intend to, oh, actually show some of the Lupari getting "spaced", but couldn't due to the previously mentioned reasons? Or did he always intended for it to be merely described by a vindictive Sontaran?
4. The way the Doctor seemed to "connect the dots" and wonder if she and Karvanista were possibly more than just "comrades in arms" during their tenure with Division... Mercy, I wonder when the first "Rule 34" illustrations of Jo Martin Doctor and Karvanista will start appearing on the net?! You know it's gonna' happen!