Easy answer, but not a complete one.
UT would also offer him a realistic chance to be unemployed in 5 years when he turns 60.
I think he knows who he is and where he fits in the coaching world. He's doing what he loves at a place he loves where they love him back.
The other part of the equation is that he doesn't have the resume for an SEC job.
He's a 55 year old coach who waited a long time to get his first head coaching job and has had a reasonably successful run at a mid major with 3 40-win seasons, one conference championship and one at-large NCAA bid in 8 seasons. Not likely to reach NCAA's this year.
He's not a hard-charging up-and-comer. And he's not an established championship-level head coach.
I respect the man a lot, but I don't think he & UT would be a good fit for either party.
Agree with most of what you say. He is clearly behind Calvi and Godwin on my list for the reasons you state about his resume.
As for not wanting to leave liberty only he can answer that but most successful mid major coaches would give it a try IMO. Liberty baseball isn't comparable to a witicha state or even a VCU in hoops. If he wants to get back to Omaha like he was as an assistant he needs to move