You haven't shown any power creep there, just story progression. It happens in real life too -- things that we thought were true turn out not to be so, in favor of something else.
That's not to say power creep hasn't been a problem in the game. I just don't see this reorganization of the lore as that. It was very messy before. It was twenty years of retcons and books contradicting each other. Chronicle pulls all that together into a cohesive story, IMO.