Question about secondary or indirect damage diagnosis?

You need a mechanical engineer to answer questions like these. I have a friend who rebuilds only smashed Chrysler products and he never concerns himself with these questions. He hooks it to the frame straightener and pulls things in the direction they need to go. There are numerous locating holes under the car where he takes measurements from. With those, it is very easy to get things correct within 1/32", but that can be hard when sheet metal is severely wrinkled. In those cases, he cuts off panels at the welds and installs new or used ones.

As a body man, he is very aware of crush zones that must not be beefed up with extra bracing, but must be as strong as original to provide proper support.

12mm is a lot in some areas and insignificant in others. The important things are the position of the lower control arm and the upper strut mount or upper control arm. Those suspension items have to be in the correct geometry for proper handling. An alignment can appear to correct the wheel for good tire wear but it takes more than that for good handling.

Doors, fenders, and the hood all have adjustments built in to overcome production tolerances so you don't have to worry if those mounting areas are off a little. If the panels seem to fit properly, I would mainly be interested in seeing an alignment printout. "Camber" is the main alignment angle that has to be set very precisely for proper tire wear, but for good handling you need to look at "steering axis inclination". That angle is not adjustable and there is no spec. Given. All that is important is the angle has to be the same on both sides, within 0.2 degrees. If it is not, the front cross member might be able to be slid sideways, or sometimes the upper strut mount can be shifted a little.