I think the Bills needed a retool/reshaping of the roster. They have basically been trying to run it back with the same core group for a few years now. While it has led to regular season success as well as some playoff success, they still haven't been able to get over the hump. Now you have age, injuries catching up with a lot of these players like Morse, Poyer, Hyde as examples. It shouldn't come as a surprise that the Bills have made some significant changes to the roster. They had to if they want to get better.