The distribution of mass in the play is badly managed.
When you lift the rear of the car, the weight distribution must change, it must transfer the weight forward or it does not change anything.

You obviously don't know anything about physics. In LFS, it DOES change weight distribution accordingly to the position of the chassis!

I don't think the garage readouts show dynamic loads, else you'd see them fluctuate when you dropped the car. The effect should be there when you're on the track.

The weight distribution is only affected by adding a mass / mass positioning.

No. The distribution of weight to the tires changes when the body rows
Google it...
In LFS that effect has been implemented even before most of the LFS players started playing it.