Despite the difficulty of trying to pin down a single player who will make the biggest improvement this season, I think Ian Bunting will emerge as a legitimate offensive weapon for Michigan football this year.
The situation between Jake Butt and Bunting is similar to the situation between Butt and Devin Funchess a few years ago (before Funch moved permanently to receiver): Butt was a big, athletic tight end that spent most of his time on offense blocking and running the occasional button hook, while Funchess was running long outs or seam routes from the other side of the line.