Maybe it's just me, but I'm not sure a ton of people are throwing Sanford under the bus for the Iowa game specifically. I've said it before, but I thought the offensive gameplan gave us a chance to win. Some poor choices by PJ, and lack of excecution in the passing game is what did the team in, IMO. Yes, the D gave up some chunk plays with missed tackles. You can certainly count those as well.
The problem is that if Sanford wasn't the QB coach, I think he'd be off the hook for the IA game. However, with Tanner obviously regressing on a massive scale, you have to look to the QB coach. So gameplan, Sanford (and maybe Simon was involved more in this game, per PJ's comments at half?) did pretty well. QB coach Sanford certainly still deserves heat. And of course, games don't happen in vacuums. These things aggregate over the year. The passing game has been garbage all year, and you can't win consistently in modern day football without a passing game. Obviously, there are exceptions to every rule -think Wisky, but they have an elite, lock-down defense to compensate.