I haven't driven it the same as when the 20" tires were on the vehicle. (i.e. sport mode and driving this thing like a sports car) Can't comment too much on any body roll since it's being driven more like an SUV now. I'll admit, I'm slightly more tentative when taking corners. That being said, the body roll is much less than the Tahoe I had. (of course)
No issues with rubbing, etc. So far, the only off road has been beach driving in the OBX. But, it handles the sand great. (this isn't like the dunes from our friend in the UAE!) One thing with air suspension, it reacts differently than coil springs. While it rides great, when you run over some drop offs in the sand, the suspension reacts *very* quickly. (almost like a "thud" which is overstating how the shocks react) It's difficult to explain, but it's what I expected.
In the sand/mud mode, the vehicle lifts to off-road height 1 and disables the traction control. (of course, it lowers the vehicle once sustained speeds above 40mph are reached)