Well, I couldn't help myself. I lumped all the rounds together even though the pins changed on some holes. After all: Why move the pins if not to help that hole perform better? If that's the reason, it's only fair to throw that into the mix when judging the performance of each hole.
Here is the result. Up and Right is good, and the bigger the dot, the more the hole contributed to sorting players out by skill. A hollow dot indicates the hole actually randomized the players' scores. In other words, there would have been fewer ties if that hole's scores were thrown out.
This is ugly. Six of the holes actually hurt the cause of sorting players out. A couple of others didn't do much at all, including #18 which gave out a ton of different scores.
When a hole is giving out a lot of different scores, it should be easy for that hole to give those scores out in a way that is better than almost all random ways of giving out those scores. With all the different scores Hole 18 handed out, it should have been a powerhouse; yet it barely helped sort players at all.
Broadly speaking, an average-performing hole with a normal scoring spread will allocate scores in a way that is better than 85% of all possible ways. All of the holes that fall below that line are suspect.
For holes #1, #3, #5, and #7 the cause is probably a lack of a lot of scores to give out. If a hole only has a few scores, that makes it tougher to hand them out in a way that breaks ties.
To zoom in a little, here is how holes #1, #6, and #18 allocated their scores. The vertical axis is the score the hole gave a player, the horizontal axis is the total score each player got on the other 17 holes that round, and the size of the dot indicates how many players who got that 17-hole score got each score on the hole in question.
Hole #1 pretty much just gave out a lot of 3s. It was also promiscuous about who it gave its 2s to – even to one of players that had the highest total score on all the other holes. This muddled the efforts of all the other holes.
Hole #6 shows how it did better at sorting players by skill. It gave out a lot of different scores, and the bulk of the low scores are given more to the better players (left on the chart) while the bulk of the high scores are given out more to the worse players (right on the chart).
Hole #18 gave out even more different scores, but there is a less distinct pattern for who it gave those scores to.