Keith,
Most of course rating comes down to personal preference. I happen to pay more attention to the ratings of those who tend to like the same type of courses as I do. We all have biases.
It has been 6 years or so since I played FH, but a few things I remember about the course that held it back a bit IMO were the 2 par 3's (?#4 and #12) that were essentially carbon copies from a shot value point of view of each other just going in opposite directions. There is a hole or two where you transition into and out of the old potato fields where it just felt overdone in terms of bunkering. It felt forced. The finish is a bit off-putting with #17 and 18 interrupting the flow of the course IMO. 17 is essentially a do or die par 3 with nowhere to miss. 18 lines up oddly off the tee (although not an issue for a member who knows the line). On the plus side there are some brilliant holes at FH. I particularly remember #5? the brilliant short par 4 that challenges no matter how close you get to the green off the tee. An uphill par 5 that doglegs left (?#13) up into a natural amphitheater. #16 has a great green complex that reminds me of a Gibraltar-type green. I loved the challenge of the opening hole with the demands of the uphill approach shot. A fantastic place to play golf, but just a few shortcomings that keeps it off my top 5 list. In no particular order I would put Royal Dornoch, Prairie Dunes, Sand Hills, Crystal Downs, Pacific Dunes, and St Andrews ahead of it right off the top of my head. It doesn't make FH a bad course, it just means there are some really great courses in the world.