You're not fully assuming the identity of the QB, you are merely controlling him. Awareness is one of the most important attributes for a QB, without the vision cone, or something like it, the QBs awareness is ignored because the user is making the decisions. It's unrealistic to be able to make decisions and find WRs just as easily
Rex Grossman as it is with Peyton Manning.
Decision making abilities of the QB shouldn't be ignored. Think of how much better and deeper franchise mode will become if you've had to sit and slowly bring along your stud rookie QB who had great throwing power and accuracy because it's a lot harder to find open WRs with him. As it is now, you could start that QB from day one; that's not sim.