I agree, but I wouldn't suggest lowering the car by backing off your factory torsion bars.... 
With 2" drop spindles you can lower the car but keep the torsion bars wound-up with the tension they should have.
The torsion bar adjusters really only effect ride height. Torsion bars are linear springs, nothing you can do to them, other than taking a torch to them, will change their spring rate.
The torsion bar adjusters control the angle of the lower control arm, which sets ride height. The "preload" is set almost entirely by the weight of the car, not the torsion bar adjuster. Even if that wasn't true, the torsion bar spring rates are linear. Meaning, you're not going to change how the torsion bar reacts to a load, only the ride height of the car.
With stock torsion bars, the only real problem you'll encounter with lowering the car is running out of suspension travel. The stock torsion bars don't have a lot of rate, so they need all of that travel. But adjusting the bars doesn't have any effect on that rate whatsoever.
