There are quite a few good comments that hit the nail right on the head. And I really didn't expect the results to be that much different. However, I think in pondering over it some of you have found out what I'm getting at.
Conditioning is often in the eye of the beholder. Royal Birkdale, to many naiive American golfers, may look like a dry, near-dirt cow pasture (how many times have you been asked by other golfers when watching a British Open....why can't they keep it green?), however we, more knowledgable patrons, know that the conditioning was excellent for the architecture of the course. However, I do believe there are many prevalent conditioning problems that plague several, if not many, great architectural masterpieces:
1) Wrong greens speed: I say wrong, because they could be too slow, and make contours meaningless, or too fast, making some key pin positions unpinnable or impossible.
2) Overall wet/soggy conditions: Especially on more linksy courses, but even parkland or mountain, overly wet courses from mismanagement of water, poor drainage to recover from heavy rains or...gasp....overseeding, can ruin shot designs and the way drives roll out and how approach shots are received.
3) Green/approach firmness: Courses that are designed for the ground game should have firm approaches. Courses designed to be attacked more aerially (as much as this GCA forum dislikes that) shouldn't have concrete greens that can't receive anything other than a wedge.
4) Overgrowth: Roughs too long and thick, low hanging tree branches, shaggy fairways, overly gnarly bunker edges you lose a ball in, rough between fairway grass and fairway bunkers that stops a drive from rolling into them.....neglect or simple ignorance from a maintenance perspective of how a course was designed to play out can detract from the best design intentions.
All I'm saying with all of this is that I have played some courses with great architecture that unfortunately had some of the above problems....and while I loved the architecture, I became disappointed that I couldn't play certain shots or that they didn't react as they were obviously intended to.
And as I said in the orginal post, I still stand by the fact that, to be my home course or for me to return again and again, I'd take a better conditioned (read: NOT necessarily green.....conditioning that befits the design and maximizes playability) course with less than great architecture anyday.
I do agree, however, that immaculate conditioning can never improve an incrediably poor design. At that point, they just become a tourist attraction and not a round of golf. (I'm sure we can all think of a couple of these.)