A look at the Sabres' depth chart: holes in the middle, surplus in the back
The Sabres' acquisition of left wing Steve Ott and defenseman Adam Pardy for center Derek Roy was essentially about swapping grit for playmaking. Ott won't put up nearly a point per game like Roy did, but he also won't put up with opponents getting out of line or teammates taking nights off.
Another aspect of the trade is it seriously altered the Sabres' depth chart.
The Sabres are extremely thin at center, overflowing on defense and well-stocked at left wing. Here is The News' analysis, based on the organization's use of the players. The skaters are listed in terms of ranking at position, not by potential linemates: