If they desired to get paid, the pre WWII architects would have modified their approach to meet the demands and methods of the time. MacKenzie was a proponent of using machinery, and given his propensity and need for seeking work, I have no doubt that he would have gladly adapted. I think that Ross too would have adapted, and Thompson was not above blowing things up. Based on my limited experience with MacKenzie and Ross courses, the blind shot does not appear to be a common element in their architecture.
In as far as NGLA and its highly regarded architecture, I am not sure that that is accurate. I have never played the course, but having read George's book, I can understand how some people look at it more as a very exclusive museum piece. The architecture could very well be outstanding, but I've also heard that some of the pros consider it to be outdated, too short, and much too quirky for important competitions. McDonald might be one architect who would probably decline to design in modern times.
The degree of blindness may be the key. I personally like to see as much as possible, but if I can at least get a sense for the hole off the tee, I can normally play the hole. For a member at GCGC or NGLA, there are no truly blind shots because through repetition, his mind's eye is well trained. For the visitor, blind holes are difficult, disconcerting, and maybe exciting. A course that is visually ambiguous favors the homer all that much more.
So, Patrick, should we ever have the opportunity for a match at either place, being the believer in the handicap system that you are, an appropriate upward adjustment to mine will be expected. I know from Redanman that you all are sporting types in the NE, so I doubt that I'll be disappointed.