This is in but I don't think CPU-controlled players ever do this. You can test it yourself by next time you have a CB or safety going to tackle a ball-carrier heading out of bounds, lay into him with the hit stick the moment he crosses out of bounds.
I was in an online franchise in an important, close game, with someone when, late in the game and me down but driving, he got too aggressive and that unnecessary roughness penalty was huge for my victory.
It was the first time I saw unnecessary roughness in a next generation Madden game.