I was just starting up a party with knights of the chalice and I noticed something that I didn't notice before. Challenge rating. It seems that that's the best way of determining who in your party is more powerful and thus, more of a threat to the enemy.
I thought it would be cool if whoever in your party gets the most kills, gets a higher challenge rating and is thus weighted to be more deadly to enemies.
Its really just a novelty thing that I thought would be cool, its not big but might be fun to see which of your characters is more deadly. I usually know it in most games, but in games where you create a party in d and d, its more random.
Just a thought.