Okay, I'm quite new to so I might not be the most helpful guy in the world, but looking at team averages for LP and PER means nothing. If a team had 7 guys at 55 low post and 5 guys at 40 Lp post the average will be about 48, incredible for DIII but they will still suck inside. In DIII, I would look at how many guys they have over 65 Pe will ok speed and bh, and how many guys over 65 Lp with good athleticism.
Try to move around your starting lineup, especially guys with low De and ATH. Marsh is a good example. Do not keep low ATH DE guys on your team that much!
Also, don't fret too much about game planning, it does not matter that much.