Andrew - I think a good barometer for the influence of modern tournament golf on architecture is TPC courses, especially those that are standard tour stops. It seems that for every example of a TPC course finishing with a long par 5, there is also an example of a TPC course finishing with a comparatively long and difficult par 4.
Off the top of my head, courses with par 4 finishers that I can name Sawgrass (Players), Deere Run (John Deere), Scottsdale (FBR), Las Colinas (Byron Nelson), Summerlin (still used?), PGA West (Q-school, old Skins, et al), etc.
Now putting water hazards on the closing hole is something that I definitely think is a result of modern tournament golf.