Tom,
I have not played The West in a few years, but I think that many of the modern Architects would love to put any one of those holes onto a modern course. However, I think it would be impossible for a modern architect to have those three "quirky" holes in a row on a modern course. By the way, 5 West IMHO also has its own quirkiness as it plays like a roller coaster. I can't say how you would get yourself out of that corner after playing 6, which would be my first choice. My guess is that you would extend 7 into a long Par 4 or 5 and take it back up the road/hill that way.
I also would nominate Merion West #6 as the most overlooked Short Par 4 in the world due to its big brother course down the road. My frequent host at Merion once took a 12 there in a Junior tournament
By the way, I still remind him about it 18 years later !