[oil pan 4]

I have never seen the powerwagons sway bar disconnect, just the guy who had one bragging about it when he wasn't crying about getting 10mpg with almost $4/gal gas.

Manually unbolting the sway bar for maintenance is fairly simple but not overly easy, I have jack, remove the wheel then use a 9/16 air ratchet and a wrench to remove the link bolt and spacers and related bushings.
Then the anti sway does not go back together as easy as it came apart.

Lowering the vehicle can be good for drive line angles, putting them at almost 0 degrees, or if the angle goes negative its usually no more negative than it was positive, which means its fine.
But then lowering screws up tire camber angles on the tires (if you have IFS or IRS). If you have a solid front or rear axle don't worry about the camber.
If your camber is out then you ride on the inside shoulder of the tire when you go low or if you set the camber with the suspension down it will ride on the out side edge when up, riding on the shoulder with bad camber wears the tires out a lot faster and compromises handling.

Independent suspension gives more ground clearance. That's why they used them on the HMMWV.

Actually I have never looked into how to raise or lower the vehicle aside from rear solid axle to frame air bags.
I would not mind being able to adjust the rear ride height with a load or leave the front end down for 99% of normal driving then lift it an inch or 2 when the weather turns or if I go off road.