Ed:
There is sufficient evidence--if one does the research, to draw a position that Ross varied his 'style' to appropriately fit the site and the soils depending on where he built. Of course, and from that research, we can find plenty of examples where he used the style and look that you have shown in the pictures. It seems that he and his builders/construction foreman favored this general look. To me details are very important, almost to a fault at times, but I doubt that anyone who is working on Ross courses, even the best of the architects, can draw a firm conclusion that the shapes were all precisely this way or that way. IMO, the edging of the bunkers at Carolina do seem close to the many Ross drawings I have seen, all of which had Ross' name on them, but none of which Ross actually drew. Quite often this was left to one or two of his right-hand associates/builders. In those drawings, you would be surprised how curvilinear many of the bunkers appeared, though as we know they were built differently in the field--normally it seems, by studying old photos, that the edges were simplified from those depicted in the drawings.
I believe what is most important when building these bunkers is to first get the location and positioning/alignment correct based on historical research of pictures, drawings and field notes as well as ensuring that the depth is what Ross wanted. When doing so, each bunker should fit its immediate surroundings and also blend into the overall look of the course and terrain, without appearing that it had no earthly business being there. If when building them, they get a little deep here or there, or if both the 'front' and 'back' walls are steep, then I guess they could be construed as "Americanized" pot bunkers. I don't think, however, that Ross, or Spence in this case intentionally set out to cause the penality you describe, though on occasion I think that would be fine.
The wavy edges I believe are fairly random, done so to give them a different appearance depending on ones position when viewing and to help them fit in. We could argue, based on subjective POV, that they are just fine or too wavy--a waste of time IMO. Also, and since I don't know if this project was meant to be a restoration (many interpretations there) or some level of restoration/renovation based on an agreed upon time period by Spence and the club, the architect must make some interpretations for the final product.