Just an FYI IGF is not below grade, or at least not as much as they originally wanted. They couldn't do it so they had to raise the surrounding grade. 

I don't know about that open end. If it is a South entrance it might not cause that much problem wind wise but it is odd that they would not have done more wind remediation like they did at IGF. It is looking pretty good though.

Just saw this video of New Mosaic Stadium tour.  Looks really good

https://m.youtube.com/watch?feature=youtu.be&v=OsLSsIg5gGI