1. The Old Course. Take it back to the 1860's when the course was half the width as to what it is today, and in reverse order. You couldn't play the Open there anymore, but you would have one helluva golf course for all abilities and all ages, using all sorts of balls and implements
2. and 3. The New and Jubilee. Take the best land and the best existing holes to create the "Super Course" that the powers that were wanted to do in the 30's and 40's and make a proper championship course by current standards.
4. From the land left over from 2. and 3. above, make a decent "2nd" course.
5. Return the Eden course to its past glory (which of course requires moving the current driving range, probably to the 1st hole on the Jubilee).
Doak, Coore, Crenshaw, Hanse, Papazian and Barney should be responsible for these changes and detained and extradicted to some place like Askernish if they refuse to implement these high level ideas until they get tired of the Hebrides.
Your can keep the Castle course as a monument to the foibles of early 21st Century architecture.