Well as long as you're playing the faction you can opt to play them 'in-character' and just not build colony pods or conquer others.
They sound rather pacifist as described, so probably -MORALE
Agenda: Planned
Aversion: Power?
Try the following modifiers:
-9 EFFIC, -1 MORALE, +2 TALENT, +2 GROWTH
Start with Hab Complex
+25% defense bonus
The power of a one city strategy depends a lot if you mod crawlers or not. With unmodded you can still be quite powerful (since crawling doesn't get impacted by EFFIC).
Probe not as crucial since your HQ will be your one city, and everything will be close by
Agenda Planned sounds reasonable, though Euidamonic sounds very much like their end game goal. I do notice a lot of factions have that as their agenda, however. And even though I am rather left wing/egalitarian myself, I don't want to limit players necessarily economically- someone might want to make a more environmentalist version of the Humanist City State, or a more Capitalist/Free Market one.
Even so, I reckon the mentality of the city state would render it more friendly towards planned economics. Especially considering the efficiency is so abysmal that you might as well ignore any positive modifiers for it because nothing is going to really improve it so that it is "good," so an efficiency malus wouldn't really change anything.
So, lets review each option.
-Government wise, they could follow suit with a Police State by being a bit more controlling and regulated of the liberties of citizens, claiming their best interests are within the confines and safety of the law and offering a more "guided" approach to their pursuits of passion and talent, for better or worse... but on the other hand it also somewhat conflicts with their rather relaxed attitudes towards what sort of path a person wants to take, provided it doesn't break the law.
They could easily follow Democracy, given that the city state would likely value their citizens welfare, happiness and overall progress as human beings, and thus respects their choice in decision making. And out of the three political choices I think this one would make a hell of a lot of sense, though oligarchies and more authoritarian groups could form.
As for Fundamentalism, a faith could spring up and convert the City State, but faiths tend to dictate the morals, creeds and the overall lifestyle a person follows so I highly doubt the government would adopt such an intrusive thing and remain for the largest part, secular...
-Economy wise,the economy of the city state could truly vary. Free Market could see wealthy patrons and organizations taking more steps in the society and reducing the government to a bare minimum of maintenance where the businesses fill the void, depending on a person's interpretation. If a problem arose as to where they are not adhering to the laws/constitution of the City State I'd likely see there'd be big outlash from both the government and citizens. Though with the safeguard controls I highly doubt enterprises would get so dominant in the first place.
Planned would make the most sense, as the state wants to ensure the continuity of the City State and its people in an organized and careful manner, and support their endeavours.
Green could also make sense if the government got a bit more protectionist over the environment of the City State and a more naturalist bent to its population and I'd like to keep it as a potential option for players.
-Values wise, the City State could take on Power if it wants to be a political enforcer, by killing rivals and razing them or by simply being a prominent regional police force. I do doubt they'd arise to be a global police force of any means though, and whilst they aren't complete pacifists I don't see them as any sort of aggressive or highly interventionist warlike faction any time soon.
Knowledge would make a hell of a lot of sense in this case, as would Wealth, because citizens may want to exceed the boundaries of knowledge or grow massively rich and live luxurious lives. So either or could work fine, as the ideal of one's peak status and potential will vary as to what it is depending on the person.
-Future Societies, Only 2 of these would really work. Thought Control is completely out of the question because the whole point of a person following their passions and taking initiative to get their potential (albiet with the resources provided to do it) is that they have the free will to do and decide what they want, otherwise its just forced application.
Cybernetic could work, as a cybernetic society could very well be fitting to the high technology, high talent society that is Metropolia, but there may be dissidence for those who feel like this community is way too sheltered and too much a gated community of talented elites, not sharing its progress with the rest of the world.
Eudaimonia would fit rather well because its the personal happiness and potential achieved through help by the city state and its community for all its citizens.
So, mulling it all over...
I think the stats and agenda would result in something akin to this:
Agenda: Torn between Planned, Eudaimonia or Democracy. Perhaps I could go with preferred Planned, but maybe have a bonus to using Democracy or some such, thought will be needed.
Aversion: Thought Control or Fundamentalism I would say.
3+ Talent
1+ Growth
9- Efficiency
Start with Hab Complex
25+ Defence Bonus
1+ Probe OR Research, or another bonus I thought of: Free Prototypes. I reckon Metropolia to be rather inventive as much as it is passionate over its ambitions and progress, and quick to adopt the fruits of its citizens labours.
Pacifist AI would likely be the smartest option; with a possible coding for no colony pods being able to be produced being another.
Suggestion for this I have is maybe add police problem... your citizen of faction sound rather independent, maybe needy... it would be good to also stop more cities from being made.
I am not sure -morale would be necessary, from what you describe city is still motivated and well trained to fight... I would think some people would want to be skilled soldiers if that was their goal. Being a good soldier and being war monger is not always the same thing, after all.
I wouldn't say that a huge parasitic culture would really develop on this environment because citizens are also, to some extent, pressured by pure social factors to have a sort of ambitious and hard working mentality due to both the state and peers being so supportive (and expectant) of them. Plus Talent bonus typically conflicts or cancels out Police negatives from what I understand.
Though I would say you are spot on for the soldiers; though I wouldn't say its enough to give them a morale bonus whilst in Combat. Merely a defence bonus due to the inspired loyalty to their City State.
Also the more I say "Metropolia" the more I kind of dislike it and find it weird. I am looking for name suggestions, if you folks have any.
At this point you might as well just write a scenario. Its insanely OP.
I understand you have a grand vision of what you want to do but one
of the secrets to artwork is knowing when to stop painting.
And another secret to artwork is to know when to keep painting and push for that final improvement. You can always paint over accidents or "mistakes" and make them into improvements. And that's coming from a guy who actually paints too ;)
(http://pre14.deviantart.net/7a8c/th/pre/f/2015/049/4/3/4317d647d4a5826510224e96b176844a-d8ijjvi.jpg) Por ejemplo
I am aware that this faction would be incredibly powerful. My aim is for something interesting to fight against or with; with this specific faction.
I am still willing to balance it a bit though for a more balanced version of the faction; so give me suggestions. I could always make their planet rating even worse at -5 so they get demon boils getting thrown at them, which would be fun to see.
I intend to make a Lets Play of this so yeah, it will be a unique scenario in a sense. I'll likely be playing with the City State faction, import factions I like and roll with it; I saw some rather interesting factions floating about on this site so I'll likely dabble in a few.