FourBeeDen
Semi Lurker
It does if they decide they can't stop the run with a CB and then use a SS or LB on him. The goal is improving the offense, not just the passing game. If the run game is working and a team adjusts its personnel to better defend the run, it will (or should) create mismatches in the passing game. If we go 2-WR and 2-TE, I don't think too many teams would use a third CB except on obvious passing downs, and if they did, they'd put that third CB on Davis before McDonald.
Maybe I misread the original premise of this thread but the idea of putting McDonald or Davis in place of the other WR opposite Boldin shows focus on the passing game... The implication is that the passing game would be better if McDonald or Davis play WR and be running routes together with Boldin instead on another WR... So I fail to see the relevancy of bringing up the run game... Maybe it's just me