Making charisma useful..
Right now I'm sure everyone is lowering their charisma to the lowest it can go to use the points elsewhere since it only effects cost of NPC recruitment.. To make it more useful it needs to be tied to more things.
1. The cost of equipment for champions/heroes would be lowered by a high charisma score of your sovereign.
2. Chances of marriage should also be effected.
3. Maybe a percentage bonus of prestige per turn based on charisma.