I'm glad others see the virtue in this type of leveling system too.

It has so many benefits beyond it's capability of producing such excellent party experiences though, it is the best way for an MMO to support a cohesive, helpful, and knowledgeable community. Sadly moving away from this model to generic whack-a-mole questing is what has turned so many of these newer MMO's communities into the sad state they are in today.