I'm big on looking at a team and how they perform in a certain area the year before a coach gets there and then comparing how they fare once that coach arrives. With an OL coach, I look at the production of the run game and sacks allowed in the passing game.
I use cfbstats.com all the time and they only go back to 2009 but that's enough of a snapshot to figure out strengths and weaknesses for this exercise.
2010 Texas (before Searels)
4.17 ypc
18 sacks allowed
2011 Texas
4.47 ypc
28 sacks allowed
2012 Texas
4.60 ypc
16 sacks allowed
2013 Texas
4.44 ypc
16 sacks allowed
2013 Va Tech (before Searels)
3.16 ypc
33 sacks allowed
2014 Va Tech
3.79 ypc
34 sacks allowed
2015 Va Tech
3.8 ypc
34 sacks allowed
2015 Miami (before Searels)
3.68 ypc
19 sacks allowed
2016 Miami
4.54 ypc
25 sacks allowed
2017 Miami
5.05 ypc
29 sacks allowed
2018 Miami
5.20 ypc
27 sacks allowed
2018 UNC (before Searels)
5.28 ypc
10 sacks allowed
2019 UNC
4.63 ypc
37 sacks allowed
2020 UNC
5.75 ypc
34 sacks allowed
2021 UNC
5.41 ypc
49 sacks allowed
I use cfbstats.com all the time and they only go back to 2009 but that's enough of a snapshot to figure out strengths and weaknesses for this exercise.
2010 Texas (before Searels)
4.17 ypc
18 sacks allowed
2011 Texas
4.47 ypc
28 sacks allowed
2012 Texas
4.60 ypc
16 sacks allowed
2013 Texas
4.44 ypc
16 sacks allowed
2013 Va Tech (before Searels)
3.16 ypc
33 sacks allowed
2014 Va Tech
3.79 ypc
34 sacks allowed
2015 Va Tech
3.8 ypc
34 sacks allowed
2015 Miami (before Searels)
3.68 ypc
19 sacks allowed
2016 Miami
4.54 ypc
25 sacks allowed
2017 Miami
5.05 ypc
29 sacks allowed
2018 Miami
5.20 ypc
27 sacks allowed
2018 UNC (before Searels)
5.28 ypc
10 sacks allowed
2019 UNC
4.63 ypc
37 sacks allowed
2020 UNC
5.75 ypc
34 sacks allowed
2021 UNC
5.41 ypc
49 sacks allowed