I understand your point, but if 7 wins is an auto-extension, how can it also be an under-performing season? It seems that Stoops has been unduly insulated.
I think the answer to your question is that it's not seen as under-performing from UKAD's perspective, but it is increasingly so from a fan base that has risen it's expectations. Stoops is definitely insulated, and that's by design.
I think if this hadn't been his contract he would have pursued the FSU opening harder. When they kind of jerked him around in their only meeting he probably was like "to hell with this" in part because he's insulated.