What really grinds my gears is the fact a single or small group of modders can fix all the QoL stuff in a matter of days yet a staff of over 250 at Larian can't spare a minimum wage intern to fix basic stuff like ownership. Maybe it's a mess of micromanagement idk. NPC inconsistencies as you mention isn't a technical job and in most cases requires a tedious slog to change 1's to 0's, utterly boring work but can add much fluidity to a game.
However Larian's post launch support is second to none if DOS2 is anything to go by so the game will get significantly more polish after release (probably). I would hope they are focusing on the game world as well as currently it is lifeless and inorganic and takes a way almost everything positive.
I wouldn't pit dedicated modders against game company devs. fixing these kind of bugs is definitely not as simple as "a matter of days", it's most likely something like "over the course of many sleepless nights", you have to play the game, pay attention to spot those, fix them one by one and check if you didn't break something in the process. it is even more time consuming with long loading times (I'm looking at you dozens of gigabytes of needlessly shiny graphics)(I have to admit that those are really good though) and you might have to start a new game every time... I'm definitely not describing what I do with every patch...
that being said, these kind of changes are the easy ones, the ones we can do on our own ( the ones I won't bother reporting I would add ), the priority right now is more at fixing what cannot be fixed by a config file tweak : the engine errors, the functions that don't work or do the opposite of what they should... and, of course, working on the rest of the game, that might be a good idea too.
so, yeah, there is definitely a job called qa testing which sole purpose is to find and fix those minor bugs but it is definitely not something you do while the game is still in production. or at all if you committed to an arbitrary release date like 11/11/11+11 and will most definitely not be enough time... the fact that larian is not pushing any agenda regarding launch seems like a good thing to me