Offenses have come a long way. If you look at some of the best offenses in college, they are a mash up of several old school offenses. Take Oregon for example. You have the modern zone read, veer principles, midline principles, wing-t principles (buck sweep), and power run game principles (I formation, etc.). You add that with an effective screen game and vertical and horizontal passing game, run at a break neck pace...and my gosh you got a defensive coordinators worst nightmare! But if you step back and look at it, it's relatively simple. It's just repped and practiced until it's executed perfectly and when it is...it's a thing of beauty!!