There are certain players and talents that are somewhat lost in the conversation about the Patriots Offense.
A) Brandon Lloyd is an 80 catch, near 1000 yard intermediate/deeper possession receiver. On any other team that would make him a star.
B) Shane Vareen is a starting caliber, classical shifty halfback who has the moves and hands of a WR, albeit he is not as trained in running a full route tree.
C) Danny Woodhead is and was the small school Heisman, (Harlan Hill) trophy winner back, multiple times. He is a complete "make-em-miss" half back able to run both into the line, wide, and catch, albeit in a smaller package.
D) While hardly neglected, Stevan Riddley is the classic NFL big back RB, with good speed andd outstanding one cut-and go ability. To a lesser degree though Brian Bolden is a slightly slower, but tougher one cut-and-go NFL big back as well. So the Pats have a both a pair of shifty halfbacks and a pair of classic NFL big back RBs and all can block.
E) After year of travail and injuries, the Pats O-line is now healthy, for the Playoffs. It features a pair of gargantuan Pro-Bowl quality tackles, and three developing interior linemen of very good size and mobility in Mankins, Wendell, and Connolly. The substitutes are proven too in tackle Marcus Cannon and guard Donald Thomas.
F) Only at receiver has the great talent been thinned out, losing TE Gronkowski and deep WR Stallworth/Edelman. Their backups are not bad though, in Hoomanawanui/Fells and old pro, crafty Deion Branch.
In short, the Patriots Offense is not running out of quality players.