The concern over some of the green to tee walks are a bit overblown IMO. I'm an out of shape occasional walker and my playing partner has a bum knee and we barely noticed any of them. As Robb mentions, the stunning surroundings make these brief strolls quite enjoyable. By contrast, the hike up the hill to 13 tee at Castle Stuart is a bit of a grind.
Not everyone's cup of tea, but Mach Dunes needs to be experienced.