Tracking metrics is an important part of Lean. Overdoing it, though, can cause bigger problems. Learn more about KPIs in this FAQ video.
One of the questions I get asked is about whether or not individual employee metrics should be tracked.
Offenses and defenses are generally ranked based on points scored and points allowed. The problem is, that doesn't account for different conditions faced by each squad.You'll face similar problems when creating metrics for Lean operation.