Glad to see some well-deserved plaudits for TPC River Highlands. Having grown up near Hartford, I got to play it a handful of times and attended the tournament a handful of times as well.
I first played the golf course my freshman or sophomore year of high school, when I was competent but by no means a very strong player. I remember being surprised at how playable it was, especially relative to my expectations for a course the pros played. I think under everyday private club conditions, it is very playable for all, especially the front nine, where there is no real obvious blowup potential. The front nine is a good mix of shots and then gets going in a hurry once you start making your way down the hill and into the cauldron of the inward nine.
Holes like 10, 13 and 17 are stressful for anyone because of how narrow they are, but from the right tees they are manageable. And I think 15 is one of the best modern short par 4s in golf, in large part because it's short enough that golfers from every tee have similar prospects of glory or disaster. And, as we see every year, the shifting hole location alters the plan of attack in subtle ways.
My one real complaint about the course is mostly a personal/aesthetic one: I liked the way the bunkers were before 2017 or so more than the current style. I understand that part of the impetus was to reduce the overall sand footprint, which I support 100% (the par-5 6th had a dozen or more, mostly in clusters). I just find that the transition from sand-faced and bowled to (often quite high) grass-faced and flat-bottomed bunkers has done something eerie to the aesthetics of many shots. The bunkers seem caught between Pete Dye and Donald Ross in terms of build. I expect as they continue to mature they will look more and more at home there.
Finally, TPC RH is a great antidote to bomb-and-gouge golf. It's about position and guile more than raw power. The course is not even 6,850 yards, yet it took -13 to get into a playoff yesterday. Kevin Kisner shot 63 twice during the tournament, but don't ask him about his Saturday. The course can be had on any one day, but it's hard to conquer for four days. It's an upper-tier regular PGA Tour host course, with an unsexy location that makes it underrated on the national scene, IMO.