I'd say that describes the first three years, but after we find out more about Mata Nui and Makuta not being real spirits, it's really just cyborgs with superpowers.

Well... Perhaps extending into late 2008. At that point, there is still this unseen superpower upon which everything depends, which must be saved. In '06, you have the entity's existence being questioned. In '08, you have the entity dying. But not until the end of '08 / start of '09, we don't know these entities as having physical embodiments. It was that mysticism that made the story for me, so I stopped paying attention after that point. :/