Tachibana telling him to stop overthinking and just trust his instincts. Aoi's biggest flaw is that his brain never switches off. The whole episode is basically him learning that thinking and paralysis are two different things. Nobody can catch up to Kuribayashi by copying him. So the notebook from Kaido and getting benched both push him toward the same thing. Finding his own way to read the game. That ending shot of him alone with the notebook says everything