I only played in the summer wind and loved it. My friends that played in a winter wind thought it was the fourth best course there so I would say the summer wind wins hands down.
I played in the winter wind with Alex. Have not played in the summer wind. Some wind thoughts:
#4 is essentially a three-shot hole in the winter wind...which might actually be better. It was a tricky green, laying up might be the better play.
I was hole-high in two on the Sahara hole (#6), although they were probably my two best swings of the day. It was fun to have the hole reachable, although the big Sahara bunker was not in play at all except to obscure my view of the green on the approach. However, that drive I hit was probably my best of the week. The bunker definitely could have come into play had I hit a lesser drive.
I would expect the summer wind to make #7 more playable, as the wind will help hold the green. It is very tough to do with the winter wind (although I did thin my approach up the hill).
I would think that the Road hole (#11) would be close to a three-shot hole into the summer wind, at least from the tees we played.
The Redan (#12) was pretty much driver/3-wood, playing dead into the winter wind. I don't mind hitting a driver or 3-wood on a par-3, but it's hard to feel like you're really going to pull off the shot that a Redan hole traditionally calls for when you're holding one of those clubs. I was just hoping to get it somewhere near the green - and I did get it onto the front right of the green, leaving probably a 150-foot putt to the back left hole location. Didn't really feel like a Redan into the wind.
#18 is a real brute into the winter wind too.
It's a windy course, and the direction all but flips in winter vs. summer. So some imbalance is certainly to be expected. I loved Old Mac, it was probably my favorite of the four. But I would love to try all the courses again in the summer wind and see how differently they play.