thanks
Functions of the agents I have said already above ( only for the babarian ones as the agents of other cultures are not mentioned in the article).
For the persons who didn't play FotS like me the foreign Veterans could go with armies to strengthen them or stay in cities to give recruits an experience bonus. Also mentioned is that they maybe can take out other agents ( but not confirmed by CA).
Advantages of the faction:
Suebi: They have the Berserks, once in close quarter fights they will fight till they die (high morale).
Iceni: They get satisfaction for their citizens with every war declaration, seems like they get a reward on raids and iron using.
Averni: They gain a higher income from handicraft goods and advantages on gold processing, also seems that they have a strong cavallry.
Carthage: Strong sea and trading nation with a satisfied population, seem to have a democracy, they have 3 political parties to choose from.
Macedon: High income and growth, advantages in handling with other greek factions, their neighbours mistrust them so it is difficult for them to form alliances.
Egypt: Strong combined forces, population mistrusts the greek upper class.
Parthia: Silk road, very tolerant so they have less risc of having revolts, no slavery --> less income.
Pontos: Spy network along the coast, good relationships to the other greek factions.
Sparta: Strong warriors, good public order, less advantages from ressources cause of their military drill.
Athen: Strong fleet but a weak army on the land, seems like they are at the beginning a vassal of macedon.
Epirus: Agricultural state, can recruit the best generals and admirals, suffers from the hate of the other greek factions.
Maybe they change some of this stuff but seems that this is confirmed