FULLBACK
I do NOT expect a fullback to change the pass/run ratio much, expect to the degree that the run is more of an option in short-yardage and goal-line situation. I would strongly prefer for Brady NOT to be our 1st option on short yardage.
LARGER OFFENSIVE LINEMEN
Yes, I also like bigger lineman. HOWEVER, nothing in the choice of lineman should IN ANY WAY detract from the #1 mission of protecting the franchise. Belichick MUST believe that the larger lineman are at least as able at protecting Brady as OL choices might have done. Again bigger lineman should help alot in short yardage and goal-line situations.
BOTTOM LINE
I agree that the pass/run ratio will change some, but that will be primarily as a result of have the better run option in short-yardage, goal line and red zone situations.
Perhaps, our new runners will get the ball more than runners in previous years. That depends on their abilities. HOWEVER, we ARE NOT, and SHOULD NOT BE, a balanced offense. The New England Patriots are a passing team as long as Brady is here.