With the caveat that everything should be thrown out of the window for this game:
I'm surprised by how much of this offense Hurts carries with his legs. They aren't especially dangerous running the ball (with backs, they are with Hurts); their counter trey play that has owned the Big XII for the past few years doesn't look particularly dangerous, because the pulling offensive linemen aren't that athletic, and they shield rather than drive, whenever they don't completely whiff. When at least one tackle isn't holding on a pass play, they're both holding; I frequently shake my head in amazement when watching them at some of the flagrant holds they get away with. Swenson is good, Ealy is average, and Proctor really sucks. If Swenson is out, that's especially big, I think. They're good at sucking you in and holding so Hurts can gash you with his legs (that's they're best play, DL run of the field and the OL holds them while Hurts runs past); he's fucking good running, basically Ehlinger with home run speed. Or black Tebow.
I was expecting more passing down the field, like we've seen in the past with OU, or even something similar to LSU this year, considering OU's strong receiver group. However, the passing mostly comes in three forms; short passes (a lot of times they'll throw a screen to a jet sweep guy after he's run past the QB) that Hurts is pretty good at hitting accurately, guys getting open in zone (most teams play zone so they have eyes on Hurts for when he runs) where Hurts usually finds the open guy if he has time, and guys running wide open deep when there's a coverage bust. I didn't see a lot of throwing 1 vs 1 down the field. I don't think Hurts is the type of dual threat that you just keep in the pocket and wait for him to make a mistake, he's good enough now to where he can beat you that way. I think you have to pressure him, but have to be careful to not overrun him.
One of the keys to the game, imo, is tackling Hurts when you get a chance. He's strong, crafty, and slippery, and hardly ever goes down from the first defender. Teams spy him and he breaks the spy's tackle, teams try to control rush him and he outruns them, teams spring towards the sidelines to contain him and he plants and cuts upfield. If we tackle him, it takes away a big part of their offense.
Defensively, they play really aggressive and downhill in their front six. The DL shoot gaps and slip into the backfield en mass, and their two off the ball LB come downhill hard, which leads to big plays both offensively and defensively. They aren't trying to take on blocks, they're trying to slip under them; Perkins is especially good at this. They haven't really played a passing attack worth a shit, so maybe they play more cautiously when a QB can easily RPO behind the backers. They rotate DL a lot, so I'd try and keep them from subbing and hopefully eventually make them tap out. To be honest, there's not a ton to take away from past games defensively, because the opposing QBs have been poor passers, and the offensive lines haven't been good. They've given up a ton of garbage time yardage.