Umm, there are like a million. I'm saying drainage should be an architectural priority just as much as strategy, variation, risk/reward, and an intuitive routing. Any course with drainage that is less than the best the property could produce has failed at a major aspect of design.
Of course, not all sites can drain spectacularly. Even though Mid Pines has drainage issues, I give Ross credit for minimizing the affect that the poorly draining areas of the site have on play. Likewise with Metairie. Sure it has a few spots that stay wet, but considering it's two feet below sea level I give the architect a lot of credit for building a course that drains better than the surrounding area.
I'm more concerned with sites that have multiple poorly-draining spots that could have been avoided or better handled. Here are a few examples:
Lassing Pointe - A Northern Kentucky course on pretty exciting terrain that just didn't move enough dirt in a few spots to get the fairways to drain. Several of them are constant problems for turf growth and playability really suffers. It's a knock against the architect that they didn't either route around those areas or shape them for better runoff and percolation.
University Club of Kentucky - Actually has two courses, both with multiple low-lying areas that could have been avoided. In this case, the drainage issues reflect a systematic problem with development in that they tried to put 36 holes on a property that really lacked adequate size. Some good holes, but nothing so significantly interesting that it was worth incorporating poorly-draining areas.
Yahara Hills - Perhaps the worst example. A Madison, WI muni on flat terrain designed with the purpose of providing affordable public golf. Such a no-frills project should have focused primarily on drainage in my mind. I'm not sure what they focused on instead, but drainage wasn't it. I played a tournament a few years ago at Yahara and its sister course down the road, Odana Hills. We played Odana after a torrential morning deluge and found it completely playable. We played Yahara the next day and it was still soaked, which is typical.
There are countless other examples. University Ridge in Madison is another good one. The bottom line is that I think getting drainage right needs to be as much of an architectural priority as anything else, and a course that doesn't get it right has therefore failed at one of the most important aspects of design. There's room for some leeway in the case of swampy sites or other poorly draining properties, but in my opinion the architect should figure out a way to get the areas in play to be the same ones that drain best on a given site.