I dont think much can be done on the models itself except maybe bake an occlusion map into the diffuse texture. The fact that reflections doesnt reflect objects and their shadow can make for exagerated reflection. Like in this case, the dark inside of the hangar should reflect on the car and it would make a huge difference on the cars' shadow side. The dark asphalt doesnt reflect on the bumpers either, instead you have the terrain light dirt reflections.
I find the new reflections still makes the shadow side of objects so much better than before.