Reducing the # of clubs as Sean suggests would create more "shotmaking". In fact allowing the players to only carry one club would produce the ultimate in shotmaking.
However, this isn't the fundamental problem that plagues the modern game.
High tech oversized, lightweight drivers and an out of control ball are the creaters of the increased distance all players ,and especially the tour level players acheive today.
Is it a better game if Bubba Watson drives it 370 and then pitches with a 40 degree club rather than 60 degree club?
Fix the fundamental problem causing the game to get so big,time consuming, and expensive-distance.
If Major League baseball with all its' problems can legislate a bat and ball, you'd think the much more civilized by comparison PGA tour could.
Fix the ball and space age equipment and the players might think twice about giving up their 2 ,3, and 4 irons.to carry 6 wedges.
If you made the max loft 56 degrees,skilled players would simply get wedges without bounce that they could open up effectively to 60-70 degrees,and carry another 56 degree wedge with bounce for bunker shots and ordinary pitching.
I'm not sure I'm ready for a game with 400 yard drives and 4 clubs.