One part of the design that I really like, and have thought would be an interesting concept for the Flames' new arena, is that a significant portion of the concourse will be outside the arena footprint under a glass roof. It sounds like it will be open to the public during the day, then serve as the concourse for the arena during events.
The Red Sox do something similar at Fenway, where they close off one of the adjacent streets next to the stadium prior to game time and turn it into essentially an expanded concourse.