Both Jingo and The Fifth Elephant missed their mark entirely with me, when I first read them on first release. Which meant that on my recent reread, I at least had fairly low expectations for them.
Jingo on the whole fared much better than the first time around, at least as far as a Vimes and City Watch novel is concerned. The prose is clever and tight, and there are many crunchy themes surrounding war, patriotism, etc. It’s one of those Discworld books that transcends the comedy to have a deeper philosophical meaning, plus as many Leonardo Da Vinci jokes as any sane person would ever want in one place.
However, the thing it doesn’t have is much in the way of… you guessed it, women.
Sybil appears in a few scenes, and is largely reduced to the role of nagging wife. I do love the bit where she chides Vimes for treating her as if she is nagging him and points out how unfair it is, but that’s Sybil for you, grasping any attempt to be awesome, in the face of difficult circumstance. She very much there to point out how awkwardly Vimes is assimilating into the upper classes, and in some cases how well he is assimilating, and to wave a few warning flags that his current workaholic lifestyle is unsustainable. This at least will be followed up in later books.