Muted characters is a good way to put it. It's good to see the characters in a variety of circumstances, otherwise things become monotonous. The danger is that they may never return to their former selves. I remember when the awesome characters on Buffy (and later Angel) experienced character growth and were, essentially, muted. It was disappointing. I know that's not quite what you are saying but it just reminded me of that. Hopefully the writers of ouat can grow the characters through the season without destroying the things that made them compelling in the first place. Then again, I'm not a writer so I'm not sure if that's possible.