Hi Andrew
1. My first priority would be to sort out the Struie course by turning it into three 9's, with a small clubhouse/starters shed at roughly where the current 4th green is. The three 9s would start and return there, and would include: a short, children's/casual golfers 9 between that clubhouse and the caravan park, with most holes along the lines of (and including) the current 3 "Academy" holes (~2500 yards); a medium length/higher challenge 9, consisting of some of the best of the OTM holes (i.e. 15-17) and some of the better Steel holes (~3200 yards); and a "Championship" 9, consisting of the new Hiseman holes going out towards the Kyle and a few new ones (~3500 yards). If that were done, Dornoch would have a truly excellent 2nd course (2nd and 3rd nines); and a very good beginners course (1st and 2nd nines), as well as a relief clubhouse that would stop all the nonsense about building a new one.
As for the Championship Course, I think periodically about what one could do to "improve" it and the answer always comes back to "Nothing"--at least architecturally. It is not perfect, but it is damn close, and that is one of it's enduring charms. What I would do is fine tune the maintenance aspects better than they are now doing, in terms of: gorse management; fairway mowing lines; bunker sand (bring back the old stuff!); and more agressive action against meadow grasses, particularly in the rough.
2. "Sutherlands'" hump, front left of the 12th green, is the feature that adds the most to the course, at leat for me. It turns what could be a simple reachable (~500 yard) par-5 into a hole where you usually come away with a 5 and too often get a 6 or even higher. Regardless of how well you drive the ball, the second must cut high over the hump or be drawn against the camber between it and the right hand bunker. I'm lucky to hit that green in two 5% of the time, in or out of competition. You are a much better player than I--what's your percentage?
3. The 4th is my favorite of a course with so many great greens. Because it is so difficult to hit (even though it is 15-20,000 swuare feet), it puts pressure on what is regardless a very demanding dive. Because it is so contoured, even if you put you ball in position A off the tee, getting it to a Position B from which you can hope for a birdie and/or expect a par is problematical. And, because of the diagonal spine that divides the green and creates as challenging and fun putts as one could expect if you find yourself on the wrong side of the spine.
4. I have no gripes at all with CONGU. It measures how you play under the Rules of Golf, and makes it almost impossible to carry a "vanity" handicap. One can get a "sanbaggers" handicap, but it is a slow a painful process, where you inch upward only .1 at a time and only by playing in competitions, and may well be cut anyway in the end if the Committee thinks your handicap does not reflect your potential. I have no time at all for the USGA/GHIN system. It was developed with good intentions (i.e. to get more people to be "serious" golfers) but it fails almost every test, including: encouraging players to play by the Rules; peer review of individual scores; encouraging players to become better golfers.
Cheers
Rich