TX 3 Putt,
I think that you've 4 whacked this one.
Ram Rock gets less played not because the other two courses are in better condition and more bland designs, but because it was built to be and is one of the hardest courses in Texas. People sometimes confuse level of difficulty with quality of design. Ram Rock is a great example that the two are not necessarily related.
The reason that Applerock and Slickrock get more play is that the former is considered to be a better design, and the latter fits the demographics of the retirement community more closely. From the back tees, Ram Rock is nearly unplayable when it is windy (most of the time) and in firm/fast condition. It is usually in as good of shape as the other two, and sometimes better because the lack of play. Members opt for the other courses because they are more enjoyable.
At Barton Creek in Austin, the Fazio Foothills and Canyon courses get more play than the C & C course not because they are in better shape (they are not) or cheaper (they are much more expensive), but because they are considered to be better designs.
In my opinion, the so-called Augusta syndrome is way overstated. Holding everything else equal, courses with substantive designs will generally draw better than those without. Superior conditioning may help a poor course survive, but it will not overcome whatever it lacks in design. And having to depend on pristine conditions to attract golfers is a risky, costly proposition.