In my eyes, the arm of the car is going to see exactly the same torque regardless what offset wheels you use, but the wheel hub is whats going to feel a difference.
The only thing I see here with offset wheels is this:
You have rollcenter action A with 0 offset.
If you use +2 offset wheels, using the same track width, the rollcenter will be higher because the upper arms (in the rear, for example) will be pointing down more than 0 offset wheels - its like lowering the inner part or raising the outer part of the upper link.
It will probably change the camber gain by only a little bit IMO, but then again you can change the length of that link (camber link in my example) to have it where you want