Both groups need to improve, yes.
But penetrating the OL on run downs is not really the job of most defensive linemen in a 3 man front. Your job is eat up blockers, and keep the line backers clean. Its their job to fit in.
So while we need more activity from the DL, in general, I'd grade the DL especially the Peterson - Orange - JR - group and add TO in there - as over a B- to a B on the season. Most big runs, even Saturday, weren't happening because they got blown up or out of gaps.
Where we need to get better at, and its the hardest thing to do in a 3-3-5 - is shed blocks a little quicker. But that is mostly considered icing on the cake in the 3-3-5. That's why Enyi/Jaquan and Big Citrus when he's right, all special. Cause they have that twitch where they can go from being engaged, to disengaging really fast. That's what makes a good DL and man, those dudes are rare and hard to find, especially at non elite level schools.
Its a hard job to take on a double team or fill the C or B gap, but guys if they have the frame and spend the time in the gym / weight room, etc, can be coached and taught how to do it. But that rapid quick twitch to go from
"oh, I'm blocked" to "see you sucker!" in about one second ... those dudes are worth every damn penny they are paid at every level. Cause when the OL is literally allowed to hold you like a grandma hugging a 5 year old - that's a skill that's hard to teach.
Coach Rasheed or any DL can teach the bob swat, push-pull, hand replacement - it don't matter if you don't have that twitch. And those dudes that do? That's the real reason the SEC has dominated the sport. Cause they, for the last 10-15 years, have had the monoply on those guys, for the most part