Don't read into that too much. No one wants to commit to the current cable model past their GOR, unless you're the ACC, and the only way they were getting the network was with a long GOR agreement.
The Big 12 has been consistent that they want to look at other options (i.e. digital streaming) as we continue to move forward. You don't want to tether yourself to ESPN right now because they're hemorrhaging viewers, and who knows if they will be looking for a new owner soon since Disney has been very open that ESPN is a huge anchor dragging them down.