Looking deeper it's a really interesting list. Some impressions:
1. The list is clearly not normalized by strength of defenses faced
2. The top P5 teams generally excel here, which is remarkable in part because of point number 1. Further illustrates how important the line is
3. Hard to tell with any certainty, but aside from adjusting based on defenses faced, it looks like grading seems relatively independent from scheme / overall offensive production. My takeaway here is that clearly an elite line isn't needed to produce offense, but without it you aren't likely to maintain that success across 12+ games to be a title threat (interestingly LSU is #30 here but despite no losses did have some close shaves during the season compared to Clemson and OSU)
4. Vandy did poorly, but their highest graded player was transfer target Cochran (#128 overall individually). They definitely faced some tougher defenses, and #128 overall is at least a significant contributor on nearly any OL in the nation and still a big win for us if he lands here