They should have done it like 'Titan Quest' Did, you could import your character from the Original into 'TQ: Immortal Throne' and the monsters would still kick your ass even if you were invincible on the later stages of the previous game, it was very interesting too.
KB and TQ are neck and neck as both are great games to me.
In TQ you may not have had the spirits of rage to hep you in a tight situation but you could summon the 'Liche King'! and he kicked ass!