Maroney's simply gone back to the way he ran in college, his first year on the team, and the second half of '07, where he was a key contributor to their playoff run.
During his rookie season Maroney had a few long runs, and generally ran the ball with force. In a game against the Bills he ran over two Bill defenders. One was a LB (I can't remember his name, but he was a starter), and the other was Troy Vincent. Maroney ended Vincent's season, and the LB missed some time as well. In a game against Cincy, Maroney stiff armed a defender to the ground on his way into the endzone, and had a number of tough runs. There are more examples from 2006, but I think people get the point.
Toward the end of the 2007 season NE faced the Baltimore Ravens, and while Maroney didn't rack up a lot yards running the ball, his long receptions were among NE's biggest offensive plays, and I don't think they would have won that game without him. He had other big games during the '07 season (103 yards against Buffalo on 19 carries, 104 yards vs the Jets, and 156 yards vs the Dolphins), but it was the 2007 playoffs where he truly shined. In games against the Jags and Chargers who were among the leagues better run defenses, Maroney ran for 122 yards on 22 carries (5.5 avg), and 122 yards on 25 carries (4.9 avg). If you go back over NE's offensive stats in those games, you'll see that Maroney was their biggest performer leading into the SB. NE then abandoned the run in the SB, but that's for another conversation.
In 2008 Laurence got sidelined after only taking part in three games, and he was injured prior to that third game. NE could have used him in '08, but injuries happen, especially at the RB position.
This year Maroney said he was tired of trying to please everyone, and decided to go back to running the ball the way he knows how. Basically, he's gone back to the way he ran in college, and it's noticeable. Versus the Jets Kerry Rhodes took a seat, and while NE lost to the Saints, Maroney ran over one of their defenders, as well. Really, I think they should have run the ball more in that game, but that's just me. We've also seen Maroney carrying defenders and breaking 3-5 tackles while gaining extra yards. So, count me among those who really likes what he's seeing from Maroney this season, but I haven't forgotten the way he ran at the start of his career either.