No brainer that the great site golf courses with a minimalist style will always look pretty good with any level of design maintenance. I took the question to mean "how will subtle designs on average sites hold up?" That is a question worth of some discussion.
Although, a theoretical test case might be Cypress Point.
What if Raynor designed it in his steep bank and geometric style?
What if Billy Bell or Maxwell did it in a style closer to Torrey Pines?
We know Mac did some pretty spectacular bunkers on a very spectacular site, which contributed to the overall design, and has worked out fine. As to the softened with age part, in this (and most) cases, the softening was a reduction in bunker shapes and edge quality. They redid them (maybe several times)
We could even compare it to Pebble, which has more ocean, but lesser bunker style.
Hard to rank 'em. But, I suspect that even a spectacular ocean side golf course does better overall if the golf features are also very good looking golf features.
Now, some of you might argue that minimalist bunkers fit seaside best, but is there really that big a difference between Mac bunkers and Doak bunkers? Neither are subtle are they?