The rendering in post 13/14 is a different design from post 1 (8 cable suspension posts vs. 4). From the story, it did not seem that they were in a phase where multiple designs were still being considered. The design with only a sliver of clear top does appear like it'd be much better shade for fans in the seats rather than just the concourses as the design in post 1. Also, the seats and other structures under the video boards appear to be removed compared to post 1 design. Post 13/14 certainly looks like a better design for shade and airflow. If they insure it, which they'd have to for financing, it will be rated past the highest winds of a hurricane.