I tend to think you’re both being a little naive :p
The assumption that the classes should balance in a way they are equally effective in all realms or are part of some intricate balance paradigm is the foundation of a very bad and ultimately different game. There as so many balance issues in...
My opinion would be if characters are prone to self interest and factions then the roleplay element needs to be much more important. What skills can affect the game outside of the combat? Some characters may find it easier to get npcs to side with them, if this is a powerful npc then it may...