I recall the World Atlas of Golf calling Sunningdale pretty important as the first, best inland course in GBI. I think Cornish said about the same.
Similarly, I think the many early US courses, where they similarly tried to adapt the old game to very new conditions, sometimes coming up with very different looks, some of which remain basically as models to this day.
Agree that Augusta and a few others courses built in the Depression, minimizing bunkers to only those in play, etc., were a big paradigm shift, that as I explained in some post on bunkers, truly lasted until maybe 2000, when free money convinced many that the big, numerous bunker era was okay for a return. For most of us, it is still the operative method of bunkering.
As to what influenced Pete Dye over there, I would guess a lot, but had the pleasure of playing Prestwick with him, and when we got to the 18th tee, he pointed to the straight ditch along the fw and said, "There! That is the feature that convinced me to move away from the curves of RTJ to straighter lines." So, there is that.
I don't recall anything telling us that Ross thought the Redan was anything special, but I could be wrong.