Nickel / Dime 3-3-5 & 2-5-4 stopping the run.

Unfair strategic imbalance with formation personnel defenses that are structure to stop the pass are very effective at also stopping the run. The offensive line is very vulnerable & ineffective against formation like  Nickel / Dime 3-3-5 & 2-5-4 Guards should pancake safeties playing linebacker and the guards should be blocking the linebackers standing in front of them. 4 to 5 yards should be the average on running plays with 2 tight ends or a tightend with fullback.  if the defence is going to leave 8 men in pass coverage.

Again strategic unfair advantage from a numbers perspective.