If you ask me, Pouncey and Wallace are up there with being as important as Ben, Hines, Heath, and Polamalu. The fact that they played the starters to start the 2nd half wasn't a surprise, most teams won't pull their starters even with a big lead till atleast a series or 2 into the 2nd half. However the fact that Pouncey remained in and Wallace too was a bit of shocker. Let's face it, without Pouncey we are in SERIOUS trouble. Without Wallace, their biggest big play threat, the offense is at distinct disadvantage.
One could argue that pulling those guys when Ben left the game, should have been strongly considered. Granted you can't rest everyone, and you only dress so many at each position so some starters have to keep playing. However when Pouncey limped off every member of the Steeler Nation gasped and held their breath.