What metric calculations should be added to MDS?

[jfh01]

We have defined a number of metrics calculation methodologies here:
https://github.com/openmobilityfoundation/mobility-data-specification/blob/main/metrics/metrics_methodology.md

While OMF doesn't require MDS users to calculate a metric in a particular way, these definitions provide a common option which cities, companies, and providers can use.

What metrics are missing are missing from the list above?