Horatio
You're welcome
He places too much emphasis on judging and guessing where the ball will go rather than actually momentally responding to the shot with reflexes.
It's that or other keepers simply judge better. Meaning that other keepers go through the same guessing-process and take as long as Ter Stegen does, only their responses consist of dives more often because their better judgment deem it necessary.
Anyhow...he is been solid so far this season. My focus is on him improving during corners.