The Bills havent prioritized DB and RB in the top rounds lately. And the when they chose Tre White, you have to admit it was a great choice.
As for missing the playoffs, yes QB is one of the top reasons but also coaching. In last few years, Marrone chose the wrong OC, Pegulas chose the wrong HC in Ryan and his circus.
Plenty of blame to go around. McBeane also havent made great personnel decisions this year (Sammy, Matthews) but the net results are yet to be seen.