Like the glove box pop open, Spare tires detach (haven't see the spare tire detach before), plastic trim parts fall off (Now some interior parts and trim just look funny and goes out of place...etc Also, when the window breaks, glass shards simply disappear. It would be nice if the glass shards stays and break other car's tires (although it would be harmful for the fps, it would be nice) as an optional feature.
Someone should realise this is nearly impossible to implement due to the difficulty and hardware limitations.
I think the body deformations are perfect, its just the little details you had stated that we both want. I also feel that body panels need scratches when deformed from impact or sliding against something. There is probably a good reason for why deformed portions of the vehicle do not have these scratches (they would have to remain on a surface that deforms in real time and would continuously change...) but i thought i would share this suggestion as i could not see it in this thread.