Part of what makes the Steelers a GREAT team is their loyalty. They stick by players that other teams wouldn't and this translates into their team sticking by them. When they went 0-4 in the start of last season, these players didn't give up. Keisel was a huge part of that 'We won't give up' attitude - so, regardless of what others may think, I want this man to finish as a STEELER.
Further, I believe that the Steelers signing of Kiesel represents a desire not to simply make the playoffs but to win the Super Bowl. This team understands that they have young players with a huge amount of potential but mistakes that Keisel would not make are being made.