is attack on titan (shingeki no kyojin) episode 16 filler?

With the two test subjects killed, the soldiers are being investigated for an unauthorized use of omni-directional mobility gear. A soldier cannot believe that one can get punished for killing Titans, but another one says that they were valuable test subjects for them after all.

They point out that they were all tired and the cadets are being targeted. Armin says that in reality, this was a blow to mankind.

Conny states that he kind of understands the motives of the culprit, stating that he never wants to see a Titan again despite initially wanting to join Scout Regiment.