I think the show suffers from too much book to show translation. I mean, I haven't read ASoS but clearly nothing happens to Bran's group during this time period or else they would have shown it. But they still have to give them scenes and establish the Reeds. So why not invent some crazy adventures for them to have while they travel? At least Jon/Ygritte breaks up the monotony of having pretty much the same plot direction (wandering around aimlessly) with their little quips and random sex.