You make it sound like WVU needed a new contract to fire him, which WVU didn't. Brown was going to get a chance this year regardless. So unless WVU fires him before January 1st, 2025, where WVU is now contracted to pay 300K less, WVU is contracted to pay more. Meaning WVU negotiated a single scenario to save 300K, but left themselves contractually obligated to pay 900K-1.5M more in every other scenario where Brown is fired.
If Brown does well enough to get a better job offer, this new contract hardly makes it more difficult for him to leave and only increases the buyout on his end by 80K this year and couple hundred grand the following years.
Hence, I don't see much advantage in this renegotiation now over doing so after seeing how well he does this year.