Maroney isn't just a speed back. Watch the games when he actually gets a chance to run. He'll bowl people over, spin, stiff arm, he blocks well. The difference to me is the fact that the Colts have such an incredible passing game. Hell, they have threats at every receiving position. We don't. When Maroney was in the game, you knew he was going to get the carry, and so did the oppositions D. Just watch the games. Ball is snapped, handoff to maroney, all lanes stuffed and maroney is nailed down. He never had a chance to really get it going. Not to mention his injury problem late in the yr.
I don't understand why so many people are second guessing maroney. He was a rookie. He played great IMO. When our offense gets rolling and more in sync, holes will open up for maroney. Next yr. barring injuries, he's practically guaranteed to improve. Just be patient.