Request for info: Culture and Unrest Public Order penalties

[Oaty]

https://forums.totalwar.org/vb/showthread.php?t=38524

That link should help

[Quillan]

I've been going by what Oaty posted for a couple of weeks now, and from what I can tell, it is dead on the money. In a recent campaign I siezed Kydonia on Crete with my Gauls. The culture penalty was 50%, but the only structure in the town was the Governor's House. I spent one turn building a Shrine to Esus, and instantly the culture penalty was 20%. Governor's House-greek, shrine-gallic. A while later, the town hit the 2000 population mark, and the culture penalty was still at 20%, even though by that time I had built all other level 1 buildings I was capable of building. The instant the upgrade to the governor's house was built, the culture penalty was gone. Any other time I have used that formula to figure out the culture penalty, is has been absolutely correct also.

[zhuge]

Nice thread but I've noticed that most of the discussion was focussed on Culture penalties and not so much on Unrest. Jerome was kind enough to provide the rough guidelines on it but it makes me wonder what are the specific factors involved (if any).

Being a player, I would like to know if there's any way we can speed up the decline of Unrest over time. Generally it appears that most towns start with 30% Unrest once you take over them and this gradually declines by a constant 5% over each turn. Adjusting tax rate doesn't seem to make much difference and neither does adjusting garrison size. Governors with traits that increase Unrest have the expected effect when they conquer a new city (making the initial Unrest 35%) but that effect immediately goes away once the governor leaves the city.
I have also noticed a couple of towns which start with 45% and 60% Unrest. It rarely happens though. The town which started with 60% Unrest appeared to have a rebellion recently (was previously under Seleucid rule and occupied by a Seleucid governor). Not sure what happened after my diplomat moved away from the place but the next turn when my troops arrived they found an empty town instead, a higher Unrest than normal and the Seleucid governor was nowhere to be seen.

Some players have complained of a permanent 15% Unrest. Is this true and if it is, why is it so and can it be avoided.