It's an interesting question for general design. Frankly, at TPC I am surprised it's that few. I would be okay conceptually with 3-4 times where the driver is an option, but probably not the best play. 6 strikes me as too many, although, and again, if driver can be hit, but the golfer elects not to because of narrowness, hazard, etc., that may be okay.
But, if the short doglegs are forcing it, it won't be popular. Courses from the 1920's (Colonial, Medinah pre Rees) got unpopular on the tour due to 200 yard doglegs and shaped shots. The pace of obsolescence seems to be increasing.
When I interview average golfers, the standard response to "How many times is it okay for the gca to take the driver out of your hands?" is "0". Some may say once, but it's rare. We all dig the long ball, even tour pros.
I wonder if just a little tree clearing here and there on those gently angled fairways would be all that is needed to recreate the originally intended challenge somewhat further up the fairway? (Haven't been there in a while)