The concept of physical literacy will definitely make the practice of assessment much tougher to deliver. One reason is the overall concept of physical literacy is not about winning or losing or who might be faster or stronger or even neccasarily even full completion of a task. Rather its about the child reading their environment, facing the task, multitasking, engaging moving, designing etc etc, thus making it much harder to assess than just seeing which child is the quickest.
However I enjoy the physical literacy model as opposed to the military style phys ed we might have experienced because it engages children on different levels. Now saying this I saw incredible value in the groups rubric because it went far and beyond the form of assessment that we might have received as children. I also enjoyed the game in relation to bat and swing where we were the trees and buckets.