We currently have nine classes, but what if we take some of their skills away but add three more classes that will take some of the skills? It would redistribute power to the new classes and add diversity though a potential weakness is homogenization and interchangeability. This would be done in such a way to raise the skill floor and ceiling since each class would have fewer resources than before, meaning less room for mistakes in PvE and PvP. This would also be together with buffing core Tyria mobs to HoT levels AI, skill, and power wise (within the context of their respective leveled zones of course) but that’s a topic for another thread.
Tl;dr: simplifying current classes but adding more classes to increase diversity and spreading out the powercreep giving the feeling of reducing it seems like a good policy.