From the photos released by the university for the scrimmage vs Mich State, we get at least 2 score updates from the 2nd half:
17:48
MSU 38
TENN 33
and
11:19
MSU 49
TENN 51
Except for his 1st season at Auburn... Gus typically loses 4 or more games each season. While he has shown some success in his head-to-head matchups vs Saban, he typically loses to teams he shouldn't.
It will be difficult to be ranked at 8-5, but not impossible. There are 5 loss teams ranked every year, albeit with 9 wins. Auburn was the last 8-5 team to be ranked in 2017.
It's a tough job, do they get a free pass? No way. Just like any other job, refs should be evaluated on their performance. If they do a poor job, they need to be appropriately disciplined.
There are different levels or grades of severity for concussions. As with everything in our culture, a word... in this case "concussion"... sends people into a panic. It's the trendy thing right now. If the doctors clear him, he should definately play on Saturday.