It doesn't matter if they have difficulty in mind, the Jedi classes are so uber that trying to guage difficulty is next to impossible. If you have a party of Jedis they could easily wipe out a small force of enemies. If they made the game that it would be difficult for a party of Jedi to win a fight, then it would be next to impossible for non-jedis to accomplish anything. So they will, logically, balance encounters for the non-jedi, yet force the player to play an uber munchkin character.
That is the paradox and why KotOR will never be a great CRPG series.