Unfortunately I did not get a chance to retake measurements this weekend when towing our Mantis but here is a picture.As promised, I did some squat/rise measurements with my otherwise empty and completely unladen Atlas.
Tongue weight of the Mantis, loaded: 475lbs.
I measured from the ground to the center of the wheel arch before, after, and with airbags.
Front: 32 3/4"
Rear: 33 3/4"
With trailer (no airbags):
Front: 33 9/16" (0.8125" lift)
Rear: 32 3/16" (1.5625" squat)
With trailer (airbags at 30psi):
Front: 33 1/2" (0.75" lift)
Rear: 32 7/16" (1.3125" squat)
As you can see, the airbag doesn't visually change the squat much, but I believe that the stiffness will be increased dramatically (haven't towed with it yet).
As it turns out, I just came into possession of a 2005 Ford F-150 CrewCab Lariat with a 30 gallon tank that I will likely be using to tow my trailer instead of the Atlas. Similar 500lb tongue weight limitation, but actually certified to work with a (probably unnecessary) WDH and towing capacity of 8700lbs. The Atlas' small fuel tank is my chief complaint—I just can't tow very far between refills, and if you're in the middle of nowhere in the desert country of Utah, a 150 mile range just doesn't cut it. Plus, towing this rig with the Atlas gets me 12mpg to 13mpg at best, with 11mpg being altogether too common. The Ford should match or beat that (potentially getting 14mpg while towing) but with nearly 2x the range because of the bigger fuel tank.
I want to love towing with the Atlas as much as I love driving it, but the diminished range just makes that nearly impossible for me.