I just picture something similar to this for the NEZ, but on a smaller scale of course.

Extend the NE and NW corners out even from the East and West, and have it drop down.
If you build a massive Vanier 2.0 on the East side, you could just have a huge concourse type area (standing room only tickets, THE SETTING).. or if you build Vanier 2.0 in the same place, it could extend up where the concourse is with office windows overlooking/possible suites, etc.
Honestly don't think it would add too much additional seating when you would be removing the fun zone and could trash the high school bleachers in the SE and SW courners.