Yeah, it is not as simple as just pushing Mack out. UT fans have hated Greg Davis, Mack's OC and BFF, ever since the 2nd or 3rd RRS that OU bent them over. Hell, after the Ron Stomp game, I can remember at least 3 different Horn fans saying "thanks for beating us today, we hope this will get Greg Davis fired" when drinking on 6th st.
It play out a little like how Snyder went out with the pressure OB was getting about Bobby Elliot with the additional Muschamp to UGA factor.
If Mack rights the ship and wins 10 games like he typically has it probably goes away.