Wow, that course is ridiculous.

Even though the scorecard shows 5 tees, the hole by hole has the 6th championship tees on it. The championship tees play to 8266 yards. Using the USGA adjustments for unrated tees, this gives a rating of 79.7 and a slope of 146. A scratch golfer could be expected to break 80 only about 1 in 4 rounds. The average PGA tour pro would probably be around 15-20 over par for 4 rounds. And they say they are trying to make it more difficult? If this course gets more difficult, you could see a US Open with the winning score worse than +10.

All the par 5s are over 650 yds from the championship tees. No pro is getting on in 2.
6 of the par 4s are over 500 yds. 2 of them are 535. The average length pro can barely get on a 535 yd hole in 2 IF they have a great tee shot.

I think for the most part, a hole over 250 should be a par 4, a hole over 470 should be a par 5, and a hole over 660 should be a par 6 for a scratch golfer. Using these #s, Erin Hills should be a par 81 from the championship tees. I'm sure in a full field event, several PGA tour pros would fail to average an 80 over 4 rounds from the 8266 yd championship tees.

And for me, about a 24 HC, 38 over 110 would be playing to my HC from the championship tees. Double Bogey would be a good score on any hole.