I think the biggest obstacles to OU landing Clark are these two:
1. He has said numerous times that he wants to see how the pg's are used on any team he is considering. Reading between the lines, I think he wants to play fast, and be allowed to make plays. The scary thing here is that OU doesn't have a team that can play fast (yet, maybe moreso this year), and Grooms certainly can't play the same style that Clark wants to play. I'm sure Kruger is telling Clark this, and hopefully that is enough.
2. Clark wants to win, and play on good OU teams. Last year's class definitely puts our program back on course, but I'm sure Clark would like to see some improvement this coming year before pulling the trigger.
JMO.