As I understand i,, hydrology (water table) issues kept KSU from doing much more with the Old Stadium. One of the legit reasons (the rest was a rush to judgement in my view) for not renovating Ahean was the fact it would have had to have been completely shutdown for over a year ... causing huge logistics headaches.
Also, if you saw the collegian yesterday, and also per someone I know in the Architectural Community, KSU is waiting on the concept drawings for a whole bunch more stuff at the football stadium and Bramlage.
With the Grain Science Complex, and the Jardine Renovation, the sports complex will become more integrated into campus in the coming years.