From what I have read, USGA is going to use this week as a test for next summer. I played out there on Friday, the last day before the course was shut down for the Amateur. The greens were fairly firm and fast, but there was only one green that I thought was a bit much and that was due to pin position (back right on
and I doubt they use that in the tournament. I did not think the fairway widths were very penal, I hit 9/14 fairways and I'm not a good driver of the ball (erratic 6 handicap). As far as the rough goes, there were places where I could play out of the rough and other places where hitting anything more than a wedge was a challenge.
I have a feeling that they won't touch the rough from what it was at when I played it. I played Spyglass the day before and thought the rough was worse there than at Pebble, but I'm guessing it was because Spyglass will only be used today and tomorrow whereas Pebble will be all week. Take this with a grain of salt, but the caddies I talked to thought that Spyglass would play 3 strokes harder than Pebble over the next 2 days.
USGA is going to use the alternate tee on 10 during the match play rounds at some point, the tee right next to the 9th green, to make it about a 320 yard hole to try to make it a drivable par 4. I have my doubts on whether that is feasible for a stroke play round next year, but should be fascinating for match play.