Easy and wide open course and to be tough the Greens which are the main defence need to be hard and fast with tricky pins.
Greens were really soft, balls plugging in first two rounds , hence the low scores.
Masters will always be relevant and in the top 4 events. ( Open Championship is #1)
a course doesn't have to post scores at par like the US Open to be relevant or a top event. Scoring is But one factor, and a small one at that.