Making it practically impossible to even recreate how my Shepards looked.
On top of it all the base facial structures and slider limits are all different on the faces. In fact the 2 faces that I have come to know and associate ME with from the start of the series now look nothing like my characters from either ME1 or ME2. As a result none of my Shepards faces looks the same.
The game simply sticks your codes into the character generator when you import a ME2 save. The import is basically unchanged from the demo.