is attack on titan (shingeki no kyojin) episode 11 filler?

On top of the Wall, Eren undertakes Dot Pyxis' orders, despite being unsure about his power. Pyxis smiles after hearing Eren's answer, declaring him to be a real man.

Afterward, he calls for a meeting to draw up a plan. Even though Armin believes that his plan is overly optimistic, Eren reassures him, saying that Pyxis knows the situation and will plan accordingly.

When the soldiers hear about the plan to retake Trost, many are discouraged, believing they do not have the technology to get it done quickly enough.