4 wide with a back in pass pro is not a bad idea with the edge rushers the Steelers have, but I'd think the more WRs you put on the field, the more mismatches you create against the Steelers' defense. Teams that have had success spreading Pittsburgh out in the past have done so with 5 wide and getting the ball out of the QB's hands after a 5-step drop, leaving pass protection almost unnecessary. The object is to get Hampton off the field and/or create mismatches wherein the Steelers' LBs are covering slot receivers, leading to easier short gains on slant patterns and such. The problem most teams have running this kind of offense against the Steelers is that most teams don't have a QB who makes reads fast enough and can't deliver the ball as quickly and accurately as is necessary for this game plan to succeed. I think Rodgers can do it, though - and that's what frightens me about this game. If they can achieve success early on with this approach, Pittsburgh is forced to pack their coverage in, which then leaves big plays open over the top, and Rodgers has the mobility and arm to evade pressure and make those throws.