This is a great topic, kudos to the OP. Inviting other people's opinions while sharing you own = solid.
Regardless of which side of the ball show more consistency I would like to see both of them raise their level of play when the game is on the line. No more long drives at the end of the game for the D, no more 3 and outs when we need to sustain drives. When I see this from a Bills team I will believe we have a chance at turning things around. The best part of the Bills teams of the 90s wasn't the K0Gun offense or the sick linebackers wearing spiderman tights, it was the team's resiliency. We could be down by a ton in the fourth and I would never think we were out of it. We could lose a Super Bowl and I would still be confident the team wasn't going to fall apart the next year.