BK
"Goalie Apologist"
I am over snarking it, but it absolutely isn't rocket science. Its something professionals can pick up in a few weeks or months of practice. Its not something they need to digest over years to understand.
This is not really true. In the Hawks case, changing systems is reversing instincts that have been in place for close to a decade. Again, the half second delay in decision making is the difference between a goal against and the man being covered.