Birkdale looks a fantastic course but i think they set the course up too soft for an Open championship, we've seen a lot of players playing from the rough and still hitting the greens without too much of a problem. Quite a few players have played for the rough on purpose to avoid bunkers or to give them a better line in knowing that it won't cause them any problems with it being thin and whispy. On a links course the protection should be the weather/wind, the bunkers, the rough along with the firm, fast greens.
The course has looked fantastic but for me it's not been as punishing to bad shots as it should be for an Open championship, i'm sure people will have different views, those are just my own.