As far as 1st hole, it is a tough one as US Open will play it different each day depending on tees and conditions. This will be true for 18 as well. Some days 1 will be a par 4 and 18 will be a five and vise versa. Will have to look at the 2 holes together as par 9.
Just played the 18 one hole at a time and looks great. Easy of course from front tees and standard greens, however as the greens are quicker, the challenges will begin. Lots of fairway areas and the short game will have to be sharp to score.