I actually think that Old MacDonald is still pretty different from the other three courses at the resort. In fact, perhaps the best thing about the resort is the variety from each course to the others, given the overall high quality of each course and their proximity. My guess is that Old MacDonald is probably the most links-like of the bunch--I think it would probably be the most "different" for most American golfers that have not been overseas. Being in that group, it certainly was the most different for me.
I don't agree with the premise that golfers won't like it because of getting beat up. While some certainly will score poorly, I don't think the course is especially hard and certainly isn't as tough as some of the great resort courses in the US. The frustration might be that it looks relatively easy given its width and huge greens, but those greens will exact more strokes than expected, especially the first time around.
I don't think the resort or Old MacDonald specifically is a course that every golfer would like or will want to visit. My guess, however, is that most of those that aren't inclined to like it also won't be inclined to visit given the effort required to get there, the cost, the walking, and the weather. That's not necessarily a bad thing, as it leaves more tee times available for those that want to get there and get back!