Tom,
Is there anything about MacKenzie's design tendencies that you consider questionable? I haven't seen a lot of his work, but he sure did seem to situate greens in bowls or frame greens with mounds (sometimes man-made) and bunkers, particularly behind greens. I can't imagine what he was thinking by framing his green sites so systematically. In the case of MacKenzie's bunker style, I think fewer would have been better.
Jon,
Tiger Woods. He'll break Jack's record of 18 professional majors (hopefully at Merion in 1013). The combination of that wallet and that wife is irresistible. Not only is he the most gifted player, he is the games best thinker as well.
Although he doesn't have anything completed on the ground and he has associates that may be doing most of the work, I think he has enormous potential. The downside is, with the kind of fees he must be charging, the types of projects he does will be limited to real estate deals or for the super rich. Perhaps he'll expand the types of projects he does and collaborate with some of today's great architects. Time will tell.