I'm not sure any US Open is set up for much of a ground game. The USGA has implemented some chipping areas and then has felt pretty good about "restoring the ground game." At BB there could be a few interesting areas where they could shave down certain greenside areas; front of 2, long 3, all around 6, long left 8, long 11 and 12, all around 15, short 18. This could create some interesting collection areas. BB has openings to most holes, the question for the USGA will be do they leave those areas at fariway height? On most holes, yes, otherwise it would look ridiculous to have a tuft of rough, but on others where the green is elevated (2,4,11,12,15,17,18) or a depression fronts the green (10,6 sort of) they may grow rough or pinch the fairway in to real tight proportions.
Nonetheless, as Rich points out, the accomplished player will be flying the ball to the green. If the greens are hard and fast, then you will see if there are intresting collection areas to capture the not-so-well struck ball, or just thick rough. I know I sound like a broken record, but for BB, if hard and fast, the "flatish" greens will allow for some very interesting and hard to find hole locations.