Probably a good idea to have a good flow of supplies to the city so you can transfer colonists.
The same problem capturing cities or diplomatically get them will occur, UNTIL you build up quality of life they will suffer population displeasure if your main qulaity of life is higher then basic levels. Build Government buildings and get private industry there.
Seconded. Other comments as well.
Also, don't be in a hurry to upgrade the settlement level.
As Twotribes wrote, the game's engine is designed to penalize you if you don't raise zone QOL assets up (in all sub-categories) together in their tiers, before you upgrade the City Level.
As background, your governor will prompt you to upgrade a city to a higher city level. Be circumspect before you choose to agree. Don't take it as a recommendation and simply agree.
The Governor AI knows you can upgrade, but they don't know if you should upgrade.
To upgrade the zone's City Level, the zone must only meet a minimum amount of population and workers.
More importantly, however, to the decision, you do not want your city level increasing until you have sufficient QOL points generated by assets.
The maximum QOL Score = QOL Points / City Level.
If the Regime Civilization Level (i.e. an average of the zone scores) is higher than the QOL Score of the zone, the zone's workers become unhappy.
The zone's Civilization Level raises to the zone's QOL Score over time.
Finally, a zone's City Level can drop if population drops below the tier threshold.
< Message edited by Malevolence -- 7/26/2020 5:58:21 PM >
Nicht kleckern, sondern klotzen!
*Please remember all posts are made by a malevolent, autocratic despot whose rule is marked by unjust severity and arbitrary behavior. Your experiences may vary.