My parents has been a member of an old Donald Ross course for 27 years. It used to have traditional old classic course greens, surface drained with a clear predominant tilt (usually back to front) and undulations within that predominant tilt. During a full course "renovation" that was completed last spring, the greens were redesigned to a much more modern segmented style with very clear, multiple tiers (up to 6 per green) of 2-3 feet high and fairly flat segmented areas.
My brother said after his first round on the course: "this place will be much harder now for the mid and higher handicap players as the tiers will drive them crazy, but for a good player who has decent control of his game, this course is now much easier."
Most of the membership would attest to the statement. I wasn't sure the greens would be easier for the better player until I watch my brother (a former D1 college player) shoot 67 today.
After the round he explained:
"With the old greens, it strategically made sense to play 10-15 ft below the hole. Putts even with the slope would have a foot or more of break, and were not likely to go in. Putt above the hole were very delicate, playable for a two putt, but if you judged the slope wrong, you would leave yourself a hanging 3-4 footer, or a 6-foot putt coming back. On average it paid to be below the hole, therefore to shoot a low score, you had to make 10-20 foot puts.
The new course is very different. The segmented tiers themselves are fairly flat. No reason not to aim at the hole. The tiers aren't problematic either. Pins below the tiers have built in funnels around them to bring average shots back to the flat segments, leading to more birdies. And there isn't any reason to fear missing a tier on the high side, because the superintendent isn't going to put the pin where a ball that drifts over the top tier will not stop within three feet of the hole. If he does, the membership will have him fired. Therefore the judgment is very easy from the top tier, find the fault line and die the ball from there. It is much easier to judge this putt compared to one with a steep continuous slope. In total, you can confidently fire at all these flags. You couldn't do that before."
He closed with this: "I get he feeling modern architects think greens with many tiers make a course difficult for good players. They don't. Greens with large areas of meaningful tilt are much harder. This is the #1 reason why courses like Shinnicock, Merion, and Oakmont are difficult for pros, and places like Erin Hills and Bellerive are not. But for some reason, architects keep designing courses that are hard for average players and easier for good players."
What causes this differentiation? Is it the age and settling of the land? or is it simply the construction of modern greens often bypass the smaller micro undulations that drive better players crazy for grander, but more consistent features within the greens?