Of course there is a risk in any move you make. But, if there is a 3 or 4 year trend of something not working, you have to take a chance. There is no reason to sit in mediocrity...I have a feeling most coaches who we would bring on, with the resources we have, will be able to replicate his past 3 seasons.
As for the entire body of work, that's the Cal argument imo. Cal's entire body of work here was impressive, but 95% of the fanbase knew it was time for him to go because it had run it's course and it was trending for a number of years in a bad direction. And it's not just this year for Stoops....it's a 3 year trend of bad losses and not beating teams you should. This year is just much worse than the prior 2.
I'm a realist....the idea that we are going to become a top 10 program is unlikely. With that said, 7-17 in conference over the last 3 years, only winning 2 conference home games in the past 3 years and 2-6 against Vandy, USC and Mizzou over the past 3 years is enough proof for me that it's time for a change.