Simon,
I understand your frustration regarding the ranking, but I remember playing during the Ren Cup and feeling that the new holes would significantly alter the character of the course and for the better. It isn't just that the new holes are coming. No, we were told that during our visit and it was hard right from the beginning not to defer our final evaluation of the course, at least it was for me.
That is an unusual situation, I believe. Where else was that the case?
Imagine playing Cypress Point for the first time, but without 15-17 existing Then, a member takes you to the land and says "we are hoping the California Coastal Commission is going to let us build these holes". Of course, you would be hoping things would work out. Of course, you would be looking forward to coming back. You would be thinking what CP was going to be, not what it already was.
By the way, of all Tom's work, my favorite could well be St. Andrews Beach. There also we were told more was coming - a second course. But, for me that didn't distract my appreciation for had already been built.
One final point, for the Renaissance Club I think the existing 1-3 holes will become something better than they already are: a great place to warm up or just play a few casual holes. In that role they will beat how they started in the golf world.