Bye weeks aren't a killer, as of this morning the team with the bye is 51-11 since 1990. I think the Steelers are just beign smarter. When they played in the regular season it was really all about two screw ups (the opening pass and the on-sides kick), throw out that opening play and the Colts only had 280 yards of offense against the Steelers, the D did well for most of the game.
stats can be deceiving