Actually anyone who knows Jeep history knows they’ve done this before! The XJ introduced in 1984 combined a stiff and light unibody with live axles and multi link coil front and rear leaf suspension; the Grand introduced in ‘92/93 added the rear coil multilink rear suspension for further refinement. When the TJ Wrangler came out a few years later it featured a suspension system nearly identical to the ZJ and WJ. The combination of the lighter unibody and live axles would work just fine and is far superior off road to the IFS and IRS used on the current Grands and smaller Jeeps because it has less travel and clearance. However live axles add unsprung weight and it is difficult if not impossible to make them ride and handle as well as independent suspension. Personally I’d live to see a full steel body Wrangler built on the Gladiator frame, with full 3 row seating and a large cargo area. THAT is what the Grand Wagoneer SHOULD HAVE BEEN!!! Think the original Grand Wag which has both more interior seating space and far more cargo space than any Grand Cherokee ever built.... ps the Grand Wag SJ and the J10 Jeep pick up shared the same platform and many parts; a super size Wrangler based on the Gladiator frame would be a great product with none of the compromises of the modern Grand (cramped, too small cargo area, suspension inadequate for real off road use).