Truthfully with the offenses around the country, and now alot of the teams in the B1G, we really need to get back to a defense more like we had in the Big XII. More and more teams are showing spread looks, yes even in the B1G. First off, to have a good defense in any level of football, you have to have speed!!! It's all about speed and athleticism these days. Undersize LBs with speed and athelticism are something Nebraska starting using in the 90s, and that worked out pretty well for us.
Many people think of the B1G as prodding and slow, which in the past they have been. However, I see that changing soon, and this league will look much different in 3-4 years. It will be much more spread looking. Why you ask?? Look how the B1G has done against SEC teams, and teams with speed and athletes. Not Good!! The B1G teams are finally understanding if they want to win MNCs Rose Bowls, they need to adopt the principles of recruiting speed and athleticism.
I would much rather see an undersized speedy LBer who can chase a play to the sideline and make the tackle. Yes, he may get beat up a little bit on the inside, but that's where scheme comes in. The DC needs to run certain schemes on the Dline to keep the LBers free to make plays, while also giving the Dline chances to make plays.
Then, after speed is size. Sometime you just need to work hard and get a recruit in like Bama's Dlinemen and LBers. They are speedy, athletic, and Big!! But if I had to choose, I would choose speed first over size. Then if you are lucky enough you get some guys in with speed that are also B1G. I've seen it mentioned on here before by others, but I could definitely see SJB being a LBer. A little undersized but would be fast and elusive to get around blocks and to get to the ball. You can cause alot of headaches with speed.
Speed = Disruption, and isn't that what you want to do as a defense?