Flexibility
The metrics are a demonstration of the idea but would require a lot more work and research to be usable. More detailed metrics would require input from experts on how to measure these attributes effectively.
To what degree can society adapt to varying challenges. There are a few metrics surrounding this.
Range of flexibility
How extreme of a change in possible for a society to make.
Speed of change
How quickly can changes be made.
Experimentation
To what degree can society experiment. Experimentation leads to more knowledge and creates more diverse options to adapt as necessary.