The Steelers will not make the playoffs but it is not Ben's fault. No consistent running game, no consistent line play, dropped / tipped passes by young receivers, etc. He has definitely made some bad throws, usually when trying too hard to make a play. He will also not get sacked more than 3 times this weekend. You clearly have not seen them play much this year. The Steelers made an adjustment to their blocking scheme after the Ravens smacked them around. On passing downs Najeh Davenport has been inserted as the TB - he weighs 250 lbs and can take on a LB - something Willie Parker has shown he cannot do.
Key to beating the Colts - you HAVE to get up on them. If you get down by a score or more you are toast. Their defense is built to rush the passer. If they know you have to pass it is almost impossible to move the ball.