Like many others, I hated the 18th when I first played it, but that was long before the improvements of the last few years. I used to play Yale frequently, and I had no idea that an alternate fairway to the lower right even existed. It was so overgrown and obstructed that it was almost indistinguishable from the rough. I only discovered it after hitting a high flare for a second shot, expected my ball to be lost in the woods, and found it sitting in the middle of a mysterious fairway. When I played it last year, I was blown away with what the tree clearing has done. The lower fairway is now a viable option and offers a much more level lie for the third; it also gives greater margin for error on the second shot.
The clearing of the mound that fronts the tee should not be understated as well. In the past, you stood on that tee with absolutely no idea what was going on -- more so than any other course I've ever played. As trees have come off the mound, it has opened up the possibility of a straight tee shot rather than a 200-yard shot out to the left, which then leaves a very awkward angle for the second.
I am now a big fan of the 18th. It isn't my favorite hole on the course, but it is certainly unique and memorable in a positive way (finally!).