Whilst I haven’t been there, Valhalla certainly didn’t do much for me in terms of strategic design or architectural merit – and the power lines and waterfalls certainly don’t belong on a major championship course.
However, it produced a compelling tournament, and a fantastic winner, and I believe a large part of this was due to the relative ease of the course and set up (aided by the weather as well). When looking at typically tough course set ups, it becomes attritional and levels out the competitors, as everyone is struggling and it is difficult for the best players to differentiate themselves.
In relatively benign scoring conditions, the best players will tend to gravitate towards the top of the leaderboard, as their superior ball striking should be rewarded.
I enjoy watching the US Open as it’s nice seeing the guys play tough courses and struggle for par, but I think a set up that favours birdies sees the cream really rising to the top.