After 24 hours of reflection, I don't think the Bills lost much by not getting Maclin, especially at the money the Ravens signed him to (including the two year commitment).
I think what's bugging me, and likely most everyone else on the board, is that it feels like the Bills are always being slighted in the FA market. I know it's not a real thing (i.e., they typically get players who they are willing to pay the most for), but after almost two decades of being irrelevant any slight hurts.