There was lots of filler in the entire episode. That Arya scene with the Lannisters moved nothing along plot wise. I liked the scenes with Sam, I chuckled at him suffering. Dan and David have no source material, so clearly they are goin the Walking dead approach and using lots of filler.
The ending of the episode was more of a waste of time then any of Sams scenes. I get it, it's supposed to be dramatic and emotional. It was just no dialogue walking. We already have seen Dragonstone, who cares.
No spoilers ITT, it's right in the title.