For those wondering about the adequacy of the traction control system in liue of tradional lockers, look to the Land Rover LR3. I am fairly certain that the company that makes the TC system for LR is the same company that Jeep tapped for the new Grand. The air suspension system looks awefully similar also, and those bags have held up magnificantly for the past 6 years with tens of thousands of LR3's well over 100,000 miles and going strong.
I think the right questions to be asking about the new Grand are:
1. Max tire size that will fit and that the drivetrain can handle?
2. Availability of aftermarket armor (bumpers, skids, sliders, etc...)
3. Durabilty of the CV's
4. Durabilty of the electronics, sensors, connectors, engine and transmission control modules, and compressor for the suspension.
5. CRD availabilty? (I think no, correct?)
6. Availabilty/Compatibility with standard OBDII or III programers to reset faults on the trail (something NOT readily available for the LR3).