Part of what made Oregon so good (Kelly/Frost) was a lightning fast RUN game. And one that relied on a lot of misdirection. Oregon used spread schemes to get defenders all over the place and then shoot the gaps.
The logic here is big hole + fast guy = lots of yards.
The problem is twofold. First, our guys aren't fast enough compared to the defenses we face. We're not outright slow, but we don't create enough space+speed to get that run threat to be taken seriously. And then we die in the air since we get forced into 3rd and longs.
The second part is that Big Ten defendes are BIG. Much bigger than Pac-12 or whatever midmajor conference UCF plays in. In fact, B1G defenses are probably the meatiest goons in college football. They might be a tick slower than SEC defenses, but none of that matters when the pocket instantly collapses under the weight of four Chevy Silverado-sized men every play.