Fabien,
Interesting. A few observations from watching the PGA at Kiawah:
1. The heavy winds at Kiawah could be a lot heavier, much like other seaside courses (St. A's, St. G's). Understandably, inland courses have lower wind on average.
2. The winds should reflect the prevailing winds at that course (and the general variations from the prevailing winds), to the extent that there are prevailing winds.
3. The prevailing winds should be consistent from hole to hole of the same course (subjet to the normal range of variation, swirling and gusting etc.) The courses are designed and played with this in mind. Because every course is laid out on real land covering the site, whether the wind is with you or against you tends to average out over the course of the round.
4. In a tourney like the current Kiawah championship, the winds could reflect those actually encountered by the players. Thus, for example, Thursday had low wind, Saturday had high wind, and Sunday had moderate wind.
5. Unplayable lies should be factored into the game - not just losing your ball. Freak situations like Rory's ball landing in the tree on the 3rd hole at Kiawah, or golf balls getting stuck in the trees at Olympic, could be built into the game (on a random basis tied to the rareness of the occurrence).