All right, after my share of games, here are some of my views on game balance :
- Geralt can go from good to overpowered as soon as he gets the medallion card, because he has several powerful cards that do not need any charge to use them. As long as it is balanced by the fact that he needs the right die, it's good, but when he is sure to get that dice, it gets too powerful.
He can also get some by the use of potion at the beginning of a fight, but this is balanced by the fact that he needs to use them at the start of the fight. Though he gains charges for all potions when he prepares himself.
- Triss, in the other hand is clearly not powerful. Her powers come with one charge, but she can only charge one card per turn, and she needs the right die to do so. She also have a medalion-like card that can gives her the right die, but it has charges and cannot be recharged. And her cards do not seem powerful enough compared to other character's cards and do not seem game-breaking if their use would be allowed a lillte more often, because, right now, it is too restrictive.
- Dandelion is near overpowered. His cards can be used as often he wants per fight as long as they have charges and it is too easy too have charges. He buy them with money and can have two coins per turns (thus, two charges per turn if he wants). Plus he can gains money with other cards, so I never found any limitation to it. And when he goes to fight with all those cards, he become so powerful that it is a wonder that the game is called "The Witcher Adventure Game" and not "The Bard Adventure Game". The only limitation to his overpower is when he chooses the quest where he needs to bring money and not proof.
- Yarpen is near overpowered, but less than Dandelion. He has the same system of cards use (as many as you want per fight as long as they have charges). But he can only charge up to two cards per turns. But his cards as the same effects as Dandelion's.
I hesitated to say that he was more powerful than Dandelion because of the fact that he can get one lead for free almost every turn if he choses to (on a dice roll).
So, in retrospect, I seem to find almost everyone overpowered, which wouldn't be a problem if Triss wouldn't lag behind with her inability to be powerful.
Or it may be because I never had luck with her.