Miller's legs looked like they were gone this season. His normally reliable mid-range J went in the tank.
His rebounding was way down, but perhaps that has something to do with the role he filled in Chicago. Without Ben Gordon, Miller was one of their main perimeter options (a role he filled with 2010 Sheed-like accuracy) and that kept him from using his impressive offensive rebounding ability.
As for his fit with Boston, he could fill Sheed's minutes with similar quality, but he certainly doesn't address any of our existing or developing weaknesses. He gives us a tiny boost in rebounding, but nothing in the way of speed. We'd still lack shooting off the bench at the wing spots, we'd remain painfully slow in transition, and we'd still lack a quick 4.
If we spend the MLE on Miller, I really hope we can trade Sheed for some help at the 3/4 (Charlie Villanueva, Boris Diaw, Marvin Williams and Michael Beasley come to mind).