I've looked on line and can't seem to find a picture of south stadium from the outside. But, I was thinking the same thing as Stumpy.
I'm not sure why they can't enclose it, put another level in half way up that would have concessions, bathrooms...etc. In my mind, this level could be put in right above the existing building. (that is if they really can't or don't want to tear it down.) In a perfect world, those class rooms/offices would be moved somewhere else into a new building.
This is basically what they did with North Stadium.