When people call an episode like this poor, I'm not sure what reason they're watching the show for as it seems to be a different reason than myself. I thought most of the plots got to move forward and most of the characters develop a step as well as some interesting insight.
The "final" exchange between Brianne and Jaime the night before he heads out I thought was very moving and really was a very big payoff scene for the two of them, even if their story ended there, it would have been a good ending.
The "girl talk" between Margaery and Sansa was cute and also shows Sansa maturing and the positive influence Margaery has on her, a slightly older woman who knows how the game is played and knows "Yeah, trust me, you could do worse".
Arya is struggling with way too much stuff and you see the influence of her dad over how she thinks verses how the Brotherhood has to manage and make compromises.
I don't know, I saw a lot of good stuff and greatly enjoyed it.
The one thing that struck me was Tywin. It was a great scene, him calling Jeoffrey a twat without using the words, I found it odd that Tywin seems to be making no effort into making Jeoffrey less of a twat. The one time the little shit is showing any kind of interest in ruling the kingdom, instead of saying "Ok, here's something you can learn" he tells him to fuck off. Which, while entertaining for us at home, seems like a bad long term plan.