To support Oudy with an example. The Princess is unlikely to make it into EB2 because she is too powerful in one regard that cannot be modded. The Princess can, and very easily, "bribe" a general from another army away by marrying them. The princess agent is 'lost' but that is not an equal exchange for a multi-star general. No way could be found to remove this ability and thus, despite the importance of political marriages in antiquity, the princess is lost as an agent.