A few Observations
1. Billy G did enough in his public rampages to deserve being canned, regardless of the wins and losses. Coaching is more than just basketball, as virtually all professions are. The guy had human interaction problems that were observable and not based on rumours. You can't blow off a 50 year tradition and think people aren't going to notice. You can't go off on a reporter in front of a camera and think that just winning games is going to save the job.
2. If Billy D can't pay his mortgage on his salary, do you really want him running your basketball program, including a budget in the millions of dollars? Not paying your bills with a good salary has red flags all over it. I don't believe he is defaulting on his mortgage, by the way.
3. Kentucky is a nutty place with nutty fans, and it will take someone who is equally nutty and or greedy to take the job.
4. The next guy will have an easier time of it, if he is just kind to people. Billy G dug his own grave by being a nasty guy in public. $6M is a nice parting gift, though. Many of my unemployed people could do fine on that severance package.
5. Completely unrelated, but I think the modern era of college basketball with fewer scholarships and one and done players makes it very dificutl to maintain elite programs. Just ask Coach K.