The arbites lady? No, not at all.
I actually really liked her and the beat cop going on a detective adventure together, tracking down leads, doing good cop bad cop, foot chases, shootouts, and all that jazz. All to crack the case and uncover the truth.
Meanwhile, the police station is a bombed out wreck, the ongoing riots have reduced whole hive towers to rubble, the Arbites' lady's boss got bodied trying to stage a coup, and the literal sky is falling.
But damm if beat cop doesn't send that 'yo boss, maybe we got a GSC problem' message before he eats it because he's ride or die that way.
It's the kind of disaster movie tragic that works for me and a lot of the endings (like the insurgents from the other hive) have that quality to them.
I also really liked how tedious and annoying dealing with the retarded rich families are from the administrative side of things. We don't get enough discussion about local government policy in 40k. Plus, seeing GSC do their thing on a planet without Space Marines and the like around to pull off heroic bullshit was rad. "What happens when nids show up at some random planet?" is at least unique.
I hope Abnett gets to write something related to knight houses sometime. Dude would go crazy inventing peasant levies and royal customs for the giant robot paladins.