I find it amusing that so many here are hesitant to blame failure on bad architecture. Professional courtesy, I suppose. Certainly our friend Tom Doak isn't so hesitant - read his observations on courses ranked low on the Doak scale.
I am convinced that a well designed golf course should not (and, in most cases, will not) fail. If you build it, they will come. There are bad designs that may succeed for other reasons - social cache, geographic need, good bargain, etc. But good courses are recognized as such and are played.
So, all you defenders of Inniscrone, wake up and smell the coffee. If it were a good golf course, the public would recognize it.