From the thread about NGLA, CBM says in Scotland's Gift that he altered almost all the holes. He made the 14th and 17th thirty yards longer; and added bunkers. He made the 2nd about 60 to 100 yards longer. He says on a number of holes he built entirely new greens. He says he lengthened some holes and shortened others. It sounds like he used the advice of Horace Hutchinson to change/add contours on a number of greens.
That, to me, sounds like a whole lot of changes. While Kidd is more vague, he says, “I’ve been back to make some small tweaks, softened some greens and improved playability." Links says he worked on four holes.
So one made some small tweaks on four holes. The other changed almost every hole, built new greens, added lots of new bunkers, lengthened holes dramatically, shortened others, and changed the greens contours.
If it's ok for Macdonald, why is it not ok for Kidd, who apparently has made far fewer changes than CBM did?