To me - shot values means what does the design reward? Here are some rough generalizations:
Nicklaus courses from his evil period (think Concession, Old Corkscrew and others) gave more of a reward to a high cut iron shot flown a precise distance. To me it seems that those designs provided less reward to a scrambler at the amateur level because the pitches are difficult enough that saving par is unlikely for all.
Crenshaw courses tend to reward a right to left shot and lag putting. They place less of an emphasis on driving accuracy.
Doak Courses tend to be almost the opposite of Nicklaus. They tend to reward a great short game with more latitude on how you get there.
Dye courses tend to reward a player who can move a ball both directions. He regularly favors moving the ball one direction off the tee and another direction for the approach. Take a look at the aerial view of the par 4's at TPC Sawgrass as an example.
These are but four examples of different tendencies from some of the most successful architects over the last 30 years. Assigning a number to each example of each approach as a part of a ranking process disguises personal preferences in a cloak of objectivity.