Anyway...
Under Sheridan here's the numbers
Penix: 11 games, 2,584 passing yards, 18 passing TDs, 11 INTs
Milroe: 13 games, 2844 passing yards, 16 passing TDs, 11 INTs
It's actually remarkable how similar the production of both of those guys ended up being in Sheridan's offense. Anyway, my point is I'm much more comfortable with the notion of Grubb unlocking a QB's potential than I was with the previous play caller...
Here's what Penix did in Washington immediately after his time with Sheridan:
Penix: 13 games, 4641 passing yards, 31 passing TDs, 8 INTs
Even his interceptions went down.
We can do Milroe as well, here's what he did under Rees:
13 games, 2834 passing yards, 23 passing TDs, 6 INTs
Weird how the trends all went one way... but it somehow had nothing to do with the OC.
Let's actually look at tMilroe's numbers under Rees and Sheridan, ALL of them.
Passing:
Rees: 13 games, 2834 passing yards, 23 passing TDs, 6 INTs
Sheridan: 13 games, 2844 passing yards, 16 passing TDs, 11 INTs
Rushing:
Rees: 13 games, 531 yards, 12 TD's
Sheridan: 13 games, 726, 20 TD's
Total TD's
Rees: 13 games, 35 TD's
Sheridan: 13 games, 36 TD's
Under BOTH Rees and Sheridan Milroe was responsible for the same amount of TD's. Taking into consideration Milroe's total production (both passing and rushing) under Rees and Sheridan, the difference in passing td's and int's isn't material enough to say Rees "did more" with Milroe.
I think you're involved in a debate that's not being had. No one is saying Sheridan was/is a "good" OC and he didn't have any blind spots. What's being said is the limitations of the quarterback were so severe that Sheridan nor any OC not named Lane Kiffin, Steve Sarkisian or Chip Kelly could overcome to materially change the performance of the position/player (Jalen Milroe). Sure, you've got people saying they don't think they can truly assess Sheridan due to the limitations of the QB. But I don't see anyone on here saying he's a good, very good, or great OC.
The evidence is clear, under two different OC's Jalen Milroe's offensive production was in the same ballpark. Were his stats "EXACTLY" the same, no, but not enough difference to start saying or implying that Sheridan was the bigger problem or just as much of the problem. Josh Pate didn't say Alabama was held hostage by the OC. He said Alabama was held hostage by the QB. Milroe's post-Senior Bowl draft stock plummet and scouting notes back his statement up as well.
Something to point out, Sheridan wasn't at the Senior Bowl when Milroe was throwing picks, fumbling, grossly missing wr's and running out of bounds before reaching the first down mark. Who we blaming that on?