is blue lock episode 15 filler?

Right after the game starts, Baro steals a goal with his overwhelming individual skills. Improved Naruhaya leads Isagi and Nagi by the nose, forcing them a tough time.

Naruhaya is desperate to catch up to geniuses like Baro and Nagi to survive in Blue Lock. Just the same, Isagi struggles but finds a glimpse of his new weapon, inspired by Naruhaya's move.

In the extreme condition where the egos of everyone collide, the time has come for Isagi to evolve.