I did not think 15 was too long. Weather and the trees on the left took away a fair amount of temptation.
Is the tee shot on thirteen still a good one? When I saw it in person I was surprised at how pinched it looked off the tee. However, I do like a tee shot that rewards the ability to curve the ball and control it.
I also enjoyed that low spinning chip that Scheffler used to great advantage. My experience with overseeded rye grass is that it is so sticky you have to hit the ball hard if you are going to land it short of the putting surface but he seemed to have the formula down. The course gave him the opportunity to showcase that shot.