You're not wrong, but I disagree that LB play doesn't make a difference. Look at last year vs. this year:
Rush defense (per carry)
2019: 10th
2020: 80th
Shaquille Quarterman (2019)- 107 tackles, 15.5 TFL
Bradley Jennings (2020)- 39 tackles, 7.5 TFLs
Mike Pinckney (2019)- 64 tackles, 12.5...