I use the Jets Dallas ATL and The Gmen and I have no Prob stopping the run its all reading the Oline weather the pull left right run forward or drop back to form the pocket .... I prefer the 3-4 over the 4-3 cause the Lbs are faster to recover ... This solution works 85% of the time and at most I allow 39 yrds a game .
I like the 3-4 very much and stop my other friends running attack and the computers. It's just this one friend who can DOMINATE my run defense. I control Rhodes but have to play back to respect Steve Smith. I use Mangini's defensive playbook because of the so many different schemes in his 3-4, but their is no 4-3...I haven't played him yet, I've been shifting the LBs inside and that seems to be effective vs. the comp, we'll see when the day comes.
Try pinching the line, and then shifting the LBers to the left, and manually play Rhodes in the box, there are tons of ways to orient your defense..........