Which existing course on a terrific site would you most like to see given a really significant upgrade? An upgrade that could transform it into being something really, really special.
I reckon I’d select the Cashen course at Ballybunion.
Atb
There are people dying to monetize this question, in the post-pandemic environment.
However, I don't think the Cashen would be the first course I'd recommend. Years ago, I spent several days on trying to figure out a better routing, and came up pretty empty. Sure, you could get on a bulldozer and smush down the green complexes into something receptive enough to make it playable in a wind, and that would be a major improvement. But the land is very steep, and that means it will still have its weaknesses in the end.
[Ultimately, I didn't take the job because I remember Mr. Jones telling me personally that it was one of his favorite projects ever, and I didn't have the heart to blow it up under those circumstances . . . even though I can't agree with him.]