These are some great points. However, I don't think Coach Orgeron's history of abject failure has been emphasized enough. Let's look at his track record:
In 2005, Orgeron was hired at Ole Miss. He tried to instigate a new offense and failed miserably. Ole Miss finished 117th in the country, averaging 13.5 points and 282 yards of total offense per game. Source: https://www.sports-reference.com/cfb/years/2005-team-offense.html
In 2006, Orgeron's offense moved up to 108th, averaging a whopping 15.7 points and 261 yards per game. Source: https://www.sports-reference.com/cfb/years/2006-team-offense.html
In 2007, Orgeron's offense made a leap to 105th, averaging 20.1 points and 345 yards per game. Source: https://www.sports-reference.com/cfb/years/2007-team-offense.html
After going winless in SEC play in 2007, Orgeron was fired. Even Charlie Strong was able to get conference wins in his third year. Orgeron ended his tenure at Ole Miss with a 9-25 record and 3 conference wins.
Orgeron then left college football for a year, and then took a position with Lane Kiffen's Tennesee program. Yikes.
After Kiffen's Tennesee program blew up, Orgeron went to work at USC. USC eventually decided to hire Steve Sarkisian instead of Coach O.
What's really incredible about this is that I can think of 4 programs with great histories that have struggled this decade. USC, Tennesee, Nebraska, and Texas. Orgeron was involved with two of those at a high level, and he was not able to right the ship at either of them. Herman, however, was able to significantly improve Texas. After 1 year, Herman's team won 10 games for the first time since 2009. Wherever Ed goes, mediocrity follows. USC was gradually getting worse before he arrived, meh when he was there, and meh after he left. Ole Miss just sort of sucked, and I don't think I need to talk about Tennesee.
Now let's look at LSU.
Orgeron's teams have scored 10 points in 3 years against Alabama. He lost a bowl game to Notre Dame. In his two seasons, he's gone 9-4 and 10-3. Counting the games after Les got fired, his winning percentage at LSU is worse than Miles's (.770 vs .743). Elite coaches make programs better. Ed Orgeron does not.