That's why I give it time to see. Do you believe Domann can continue to develop into an every down backer? Do you believe Nelson has to potential to get after the passer? Or how about Alston, or Tannor, or Hannah, or Graham, or anyone we can get over the next few years. What was inherited was faulted. What defensive scheme makes Alex Davis better, keeps Domann from getting hurt, allows Tannor to better take on blockers that have 80+ pounds on him or can reel in Nelson to play assignment based football as a true freshman and not make "freshman mistakes."
They may be resolved by pieces that need more time, or it may be a scheme fit, we won't know until we give it a chance to work. Also, If you're relying on your walk-on program to get you back to a top 15 team, you will not become a top 15 team. Nothing against the program, but walk-ons are nice and can help but you never COUNT on them actually panning out, you're just pleasantly surprised when they do.
If you believe it's a scheme issue, then enlighten me, what scheme would work this year with the "personnel issues" you've seen through 8 games this year, or the 12 from last year?