This is what I think will happen.
It will be a total rebuild like MAT wants, but it will be in phases like Maggard has already said.
The SEZ is up to code. That will be left alone. The upper deck will be torn down and a new structure built in such a manner that has minimal effect on the current, home side seating.
The next phase will probably be getting the home side seating up to code.
The next phase will either be addressing the student side seating code issues, or doing a NEZ, then addressing the student side seating.
End result after this multi year, multi phase project is a completely new structure.