Long Cove is still an excellent course. I've lived at HHI for 24 years and watched it, and about 25 other courses, mature. Generally speaking the homes are well-tucked in among the forests.
I think what makes Long Cove so good is the contours from tee to green, but particularly in the greensites. It all blends in very naturally and doesn't have any extreme, unnatural features that Dye has used in some of his courses. It's a very strategic course and it's all you want when it's fast and firm, which is most of the time.
Many of the greens are at or near grade allowing for running shots and green contours are bold but not over the top. The key for me is keeping the ball in play off the tee, not missing the green in the wrong place and navigating the contours on the putting surfaces.
I rank it No. 1 in the state and it's always close in the ratings with Harbour Town, which has improved greatly over the past 5 years, The Ocean Course, Yeaman's Hall and recently Sage Valley by Fazio.
Long Cove was built right after the TPC at Sawgrass which was so controversial that I think Dye intentionally used a much more natural design style at Long Cove, and of course there were a number of budding architects that worked on it, including Doak, P.B., Tim Liddy (I believe) and a couple others.