Has Sark taken any players from defense to put them on offense? Schooler moved the other way, but that's the only one I can remember. Sanders really wanted to play offense so you can't blame Sark for giving him the chance. It's hard to point to any sign that Sark is interfering with PK. The initial game planning has been sound and the defense has held its own in the first half of every game including Arkansas and OU. The second half is the issue. The two most obvious explanations for a defense struggling late are TOP or turnovers/field position. Neither of those have been consistent problems. TOP was likely a factor against OU, but has been relatively even in the other games so that doesn't explain the defensive struggles. Turnovers and field position haven't been an issue either. Worthy fumbled the kick-off, but the flood gates were already open at that point.
If anything, Sark may not be involved in the defense enough. Someone pointed out in the game thread that we have a great offensive coordinator, but it's not clear we have a great head coach. For whatever reason, PK doesn't make adjustments or isn't making them fast enough. That's where a HC would generally be able to help, but I don't know how engaged Sark is during the game on that side of the ball.