If you're wanting to compare just the QB passing aspect of the game, I think you'd have to change the way the stats are kept. QB gets credit for the yards thrown, receiver gets credit for YAC. QB gets credit for the TD if the rec is deeper than the D / receiver goes untouched. This way 10 bubble screens = 15 yds, not 500 yds & 8 TDs due to poor tackling.
I don't like it, however that's my suggestion to remove the play calling variables.