I'm lucky enough to have a "control" fort for this experiment, since my wife also has a fort also about 6 years in on the same build. She has plenty of steel and even mithril locally, happens to have had fewer and smaller invasions, and treats her citizens better (big personal rooms, furniture is all decorated, train safely in the Training pits and Blood bowl for a while before they go to the front line). Also she actually builds some effective defenses, whereas I... um... have been doing important weapons effect balance testing? Even with such a perfect fort, she has over half of her orcs at neutral, but most of the rest are happy, with ~5 maxed out ecstatic. So that's another data point. So i have some tentative conclusions.
* Some of Tarn's DF personality features still need tweaking. Away from good food, away from family, away from tradition, etc. just keep racking up even when you're surrounded by masterwork lavish meals and many new friends.
* Ologs being able to one-hit kill a resident elf bard or snaga in a bar fight, i classify as a feature, not a bug. The player has enough tools to work with it, like keeping the ologs extra happy, using a special burrow for undercastes, etc.
* When it comes to unhappyness due to corpses and bodyparts on the battlefield, i will give the player some more tools (more to do with bones, crematoriums, etc.), but ultimately i think the player is going to have to spend some extra attention to clean-up, relative to older versions. Garbage dumps and refuse piles actually put out of sight, many butcher shops if you're using fix-sentient-butcher, not weak-willed individuals at butchers, etc.
* I am sure there are ethics coming in to play: [ETHIC:ASSAULT:PERSONAL_MATTER], [VALUE:FAMILY:30], [VALUE:SELF_CONTROL:-15], etc. I might think about tuning some values or Willpower attribute a little bit.