While I don’t think there was a concerted move by the USGA to drastically toughen the course today (they were not expecting the wind to blow as it did later in the day), they did acknowledge they made a mistake in not watering the greens yesterday morning, anticipating less wind.
One issue that I don’t hear enough and needs to be addressed is the desire to reconstruct green complexes to the original designs of Ross, Alison, MacDonald, Tillinghast, etc., designers of courses in the early part of the 20th. century. The modern golf ball is too hot and not soft enough to be able to have the control into and around these reconstructed greens as was evidenced yesterday. The prevalent ball design that most professionals played for virtually all of the 1900s was wounded rubber bands around a core, the cover continually made softer until balata was used for ultimate softness and control. The current iteration of the golf ball used by professionals is geared to limit side spin with longer clubs and, while offering good spin rates on approach shots and decent control around the green, its workability and feel is nothing compared to balata three piece balls.
Couple the hot ball era with incredible advancements in turf science creating pristine, tight fairway and fringe conditions which pros demand, something has to give and when a championship track is set up to major standards, there’s only so much a ball can do. The trade off is 300+ yard carry average off the tee for the other tournaments each year with more fairways hit. Nothing wrong seeing a course not yield 16 under par like last year at Erin Hills, good to see it more in line with Merion in 2013.