I don't think that matters at all, it still gives you the possibility to do some sort of recovery shot instead of a rethrow with a disc you normally would not use for that shot. If infact is too thick there it's not too many hours of work to clear some of the stuff out to have a reasonably tough rough.
I don't have a problem with a course generating big scores such as the USDGC-course does. The problem is what I pointed out, the lack of recovery shots, but also the fact that a big portion of your score comes from shots you didn't infact throw, all the penalties for OB.
Again,IMO, it is a misconception that the USDGC OB strokes were a large factor in scoring for the players that should actually have been playing the USDGC. I'm not going to discuss the 900 rated players scores. Their time there was just a reward for doing something for the PDGA and their scores don't matter. The top 30 players took less OB's than last year. Because the OB was punative they stayed in bounds. In years past, they would go OB almost on purpose knowing they would still get a Birdie. this year you had to get a birdie with 2 300' shots+ putt instead of 1-600' shot + OB stroke + Putt like last year. The USDGC doesn't generate "Big Scores" The winner was -20 or something this year.
Winthrop is one of the best spectator courses. The entire course is easily viewed and accessed by the various broadcasting companies. At its core, it is just a very easy course with out the ropes. You need the ropes and changing rules to create Drama for the spectators and cameras. The rule didnt change anything, but made it more interesting for those watching.