I think 13 shows genius, and I am just coming to understand it after contemplating it long and hard.
From the normal up tees - right next to 12 green - it's a very cool par 4, where at least for me, the central bunker dominates everything. I can get over or around it, but only if I hit it my best. It must be avoided. The fairway is huge, but the temptation is to go left, to shorten the hole. Then you realize the enormous turbo-boost you can get if you get over or around the center bunker - getting to maybe where you have a wedge in - and the temptation is greater and greater. You see the angle is gonna be better from the left, and the temptation becomes too much to resist. Then you dump one into that center bunker - or worse, miss left into the native - and wonder why the hell you didn't just play safe to the right.
Then from the back tee... for me it's a par 5. 510 is not something I can expect to do in two shots. And in fact, getting the second shot over the second set of bunkers (100 yards or so short of the green) tends to dominate things. So whereas the tee-shot is semi-heroic from back there (hitting over 12 green, bashing it as hard as one can to get out to the fairway), it's not nearly as big of a deal as the 2nd shot.... which is very very strategic and potentially heroic.
Put all this together and you have one incredibly "flexible" golf hole. As Adam once said, one's playing will depend on nature, but mother and human (a great line, btw). Very, very cool.
6 from the back tees is one damn fun tee shot also.
TH