First thought was didn't they just finish a substantial renovation and expansion? It was underway when I was down there three seasons ago.
Second thought: Did they think this through fully? Losing 3,000 seats will drop them one spot in the heirarchy of Div 1 stadia. Not that big of a deal normally but this would mean they would get passed by...Nebraska. I can't see that going over very well with the Sooner faithful.
EDIT: Actually I lied. My very first thought was in response to the thread title. You are seriously just now jealous of Oklahoma football?