Stunts and games by the defensive line aren't a quick fix and instant answer if you can't get pressure on the QB the traditional way. As
@slugboy said the defensive front ran plenty of stunts with Andrew Thacker as the DC before getting demoted. We ran plenty against Miami. We ran them against Virginia. We really them against UNC. So us using that particular technique is not the problem. The issue is what it's been all season, you just don't have the talent up front. That's not to say anything disparaging about our guys but losing Keion White to the NFL hurts, losing Sylvain Yondjouen to injury hurts. If you're looking for a way to clean up the defense in a huge way you already mentioned it. TACKLING, TACKLING, TACKLING, and more TACKLING.