I would like to say, I personally had kind of a small re-evaluation of the episode since I saw it yesterday and thought more about it since then.
What really didn't gel with me was how the goofy, M'Benga as a Jack Reacher/John Wick power fantasy and a trope-y Hollywood badguy really clashed with the more serious war tone.
It wasn't as bad as in the season premiere with the slo-mo fistfights against mooks forgetting they have knifes and guns. But still.
However - in total I would put it up a notch, because the war itself was depicted absolutely perfect. No shooty-shooty action glory. But a constant noise on the background. And young soldiers being rotated in, and carried back out again. And the people being aware of the necessity of it (protecting their home), while still seeing the audacious human costs and senselessness of the situation itself. In this regard it was better than most other portrayals of a "necessary" war of good vs evil in sci-fi, and certainly the best portrayal of the DISCO war.
So in the end I would still put this one in the "firmly good" category of episodes. And even if not completely perfect, it absolutely elevates the series as a whole to also tackle such serious episodes so well.