I think it is very important to develop the characters and have them further the plot. And i think everyone needs to think of the one hit episodes like The Price of Gold, True North, and Hat Trick as Emma episodes. They further Emma’s character growth and therefore her plot. I don’t consider them filler because Emma is like the main character, but she isn’t in the fairytale land so they show a character or situation that is parallel to hers and use that to let us glimpse where she is at and further her plot. I mean Emma looked in the book and seems to be considering whether or not what Jefferson said was true or not. That is a huge step forward in the plot in my opinion.