Not so fast my good friend. You changed the angle of the shock relative to it's lower mounting point once it is in motion. Picture this please, with the shock lowered it will rotate with the arm more than converting that motion to shock travel. That's why the nitro sedans and Proto have the shocks mounted that way, to still retain the shock travel to wheel travel part right.

*edit* Here we see what happens when you skip a step in the thinking process, the entire shock was moved down so there isn't a progression change.