Oh I agree as a whole the course is superb.I quite like Belle Dunes played it years ago with my dad and Hardelot.
I walked the whole course at Le Golf National when watching the RC, 17 was the blandest of the holes on the estate and is exactly as you describe it, but when you consider before it was a golf course it was a waste disposal site meaning the whole thing is manufactured, its certainly a thing of beauty.
There's 2 others that whilst better holes aren't really in keeping with the stadium course design. Can't recall hole numbers but one had a raised tee and green played between dunes, the other I believe about sixth hole is the one alongside the boundary fence where there is a dune on the left and a split fairway divided by rough.