I really appreciate that they're starting to lean into the Klingon War as a major event that at least some of the characters lived through. The Discovery crew missed a lot of the worst of it due to their sojourn into the Mirror Universe, and when they returned, it was clear that things had gone very badly for the Federation.
Melissa Navia has talked about integrating what she knows of Ortegas' experiences in the war even during season one, so I think there will be more of this to come.
I think it's really fertile ground for storytelling. TNG's The Wounded with Captain Maxwell and O'Brien was fantastic, but we've never really had any Starfleet main characters really grapple with the aftermath of a war. DS9 certainly showed us the toll it takes during a conflict, but not so much the years afterwards.
How far will Starfleet officers go to avert a war now that they've had to suffer through one?