since you are obviously not a fan of our team, ill help you out. In GW's system, you dont need top talent on the defensive line, it is more important to have good lb's. Example, just look at our past defenses under GW that were top 10, and tell me who was on those lines. NO ONE. The main part for our lineman is to know their assignment, and fill their lane.
Now look at last year. Our problem was with our MLB and WLB. First of all, ill start with marshall in the middle. The guy doesn't know how to shed blockers, and was constantly getting pushed around in the middle, allowing the constant 6 yard runs that kept runs going. Now, look at holdman at the weakside. The guy is just flat out bad. Do you really think it is a coincidence that in the 2 years he has been named a starter, our run defense has dropped drastically?
I think bigger upgrades then the Dline were the ones we now have at linebacker. Fletcher in the middle (regardless of age) is a huge upgrade. He is a solid player, who hasnt missed a game in his entire career. He knows how to read defenses and get to the ball (hence why he has over 150 tackles for 3 straight years)
Then at weakside, we have either McIntosh or Marshal, either of which will be a big upgrade.
So while an upgrade on the dline would have obviously helped, I think a bigger upgrade for us is at the LB position, because GW relies on them