What is "overboard" is purely a subjective determination. While many would call something "overboard", I tend to love those features. For instance, while the "sensative" golfer may criticize the narrow approach shots into #6 and #16 at Pacific Dunes, they tend to be 2 of my favorite shots on the course. Here is one vote for architects to continue to push the envelope.
Also, what is "overboard" greatly diminishes with time. Some of the best golf holes were once considered "overboard". There are countless examples of this position on the legendary Scottish golf courses - North Berwick say. In modern times, there is no better example than #17 at TPC Sawgrass - like it or not, it is today generally accepted in gca circles.