Tommy,
Great Topic!
At TPC, for my game, I think the angled fairways make it tough, because there are many holes where I need to combine correct distance with angle to avoid hazards either side. And, I can't fade, and espcially draw, the ball at will, at least in a controlled manner.
Of course, you are talking about the angle to the green, and I presume, the frontal opening. I think its less. I asked one pro this, and he said job one is always to get the tee ball in the fairway. If he gets a frontal opening, so much the better. The advantage is, if he is between clubs, he can club down, leaving an uphill shot for birdie. If he has to come over a bunker, he has to hit the longer club, and play it for more spin, and/or find a backstop slope of some kind to feed the ball back to the pin.
While walking another course with my co-designer pro, he commented that the right side of a particular fairway was really the best place to hit the tee shot, even though the left had the frontal opening. To him, it was like teeing near the out of bounds to increase the margin of error. He wanted to come at the green from the bunkered side, aim at the far left edge, and hit a fade, so as to start the ball as far from the bunkers as possible.
Green angle (i.e 10 degrees right) also had an effect on his thinking, as did wind and general green contour to the right - when an approach shot has all the signals pointing right, then he hits a fade, and it is a comfortable shot requiring only proper aim and execution. Conversely, he hates any shot where there are mixed signals, and/or the signals force him to aim at a hazard and curve the ball away from it. That tends to happen when you play for the side of the fairway where the green has the traditional frontal opening.
Of course, for a large portion of players, the frontal opening is essential as they still roll long irons and woods on to greens. Also, a frontal opening gives them some kind of visual comfort versus coming over the bunker.
Not really what the golden age architects had in mind! But in a way, they talked about creating run ins, pitch shots, etc. and that is still true, its just that the slopes designed to accomplish that are no longer outside the green, but rather inside the green as backstops.