Does the Oline need to beef up?

[BleedNOrange]

Here are the league stats for passing yds/g and rushing yds/g and the bubbles represent the size of the OL.  I know there are a lot of variables such as how good is the QB and how good is the RB.  However, I don't see much of a trend if larger OL are better at rushing and smaller are quicker for pass pro.  

Colored bubbles are AFC north.