You guys should listen to Mike Nuzzo!
Sean, Kalen -
there are some commonalities, no doubt, but while I want to defer to your greater playing experience, I feel compelled to suggest that "a ton of classic courses" didn't actually manifest all those 9 qualities, especially not originally, and certainly not to the degree and consistency with which a very broad swath of today's new courses do (and by a very wide variety of architects at that).
Did a ton of classic courses really have: a preponderance of deliberately planned half par holes and short 4s (as opposed to those emerging over time because of changing club and ball technology)?; almost no significantly canted fairways?; uniformly good visibility (and lack of blindness) throughout a round, and at one course after another after another?; an almost complete lack of truly penal bunkering?
Did the classic inland courses really offer (and/or did so many of them offer) such wide fairways, especially if they weren't seas-side links courses or prone to much wind? or did they ever even consider making such allowances -- as modern multiple tees do -- to such a wide range of shorter-hitting players?
I don't think they did, and, while I could be wrong about that, I'd suggest that those classics were harder and more challenging -- and were meant to be harder and more challenging -- than their "modern golden age" equivalents are. And this modern "ethos", this "you may not score under par, but no one will get his ass kicked" approach to design, this friendly and welcoming value-system that is shared by almost all working architects today, I've suggested might be referred to as the resort course style.
More importantly (to me) is that, as Ben notes, no less august an observer as Ron Whitten and his Golf Digest only dub three courses out of the top 20 as officially "resort courses" -- so unaware (from my perspective) they are to the reality that this approach dominates the modern design game.
Peter