Good, well thought out post. i have a few disagreements however...
1. if we keep 5 RB's, it'll be 4 HBs and 1 FB. i cant see us keeping both viti and barnes. But i could see the bills carrying Lynch, Jackson, Omon, and Wright
2. On the OL, you left out Whittle. I think him and Murphy make the squad, with Bell/huggins and preston being cut.
3. I think the Bills will keep 6 CBs and only 6 LBs, not 5 and 7 as you have. On my list, costanzo gets cut and Youboty stays on.