I like the idea of a gathering area, berm, etc. People flock to areas where you can stand around and congregate, maybe some bar height railings with bar tops on them on the edges of the concourses, similar to what the Rays have in the outfield, and Lightning have in the corners. Also I love when the concourses are open and have a view of the field area. Shade is a must, if there is a way to design the stadium for maximum natural airflow to keep it cooled off, that would be great. I think they did that for the World Cup venues in Qatar to mitigate the high temps.