Bledsoe deserves some blame, but not more than any other part, and certainly NOT the majority of it. I mean Lindell kicking-off to the 26 and the ST's allowing a return to the Bills' 49 (with penalty) to set-up a TD drive by the Steelers' 2nd stringers is inexcusable. The O-line failing to get McGahee more than a yard on 1st down more than once is inexcusable. Lindell missing a 28-yard kick is inexcusable. The defense allowing the Steelers' 3rd string offense to score 6 points and go on a 9-minute drive is inexcusable. And as has been mentioned, the coaching was inexcusable.
Bottom line is they played tight while the Steelers played loose, and mistake from ALL AROUND resulted. Hopefully the team learned and grew from that, and as I've said, there are numerous changes that need to be made other than QB, if even that.