I have two comments after the fact.
1. I was OK with the low scoring conditions. I feel a full size golf course that yields birdies on 40% of the holes to the winning player is a reasonable method to test the golfers. I thought the main reason for the low scoring was the small, predictable breaks in the putts. 80-90% of the approach putts seemed to break a little left or a little right in a very predictable fashion. You might argue these types of greens best reveal who is putting well. DeChambeau thought he had made the 5 footer on the 4th(?) playoff hole, and acted like he had misread it; otherwise, I hardly saw anyone who acted like they misread a putt.
2. DeChambeau's inability to make a putt to win leads me to believe he may be experiencing some mental barriers to winning. The galleries have been cruel to him this summer, and it would be hard not to be affected by that. His tee to green game was very impressive, to say the least. I'm predicting he'll win many more tournaments in his career, but he may have some work to break through and win the next one.