If I were in charge over at Jeep, or Cerberus, or wherever... (Jeep employees--if you're reading, take notes!)
The line-up would be: Wrangler, Wrangler Unlimited, Grand Cherokee, Liberty, Patriot
The Wranglers would ditch the gutless 3.8L in favor of the 4.0L from the Nitro. (We rented a JK Unlimited for a weekend of off-roading at Canyonlands. On the road, that engine is next to worthless in a 4,300-pound Jeep.) It would also be easier to remove the rear section of the hardtop. The front bumper would be a stubby bumper. The rear swing gate would get a gas strut to keep it from bashing into your legs all the time. The headrests wouldn't be hard as rock.
The Grand Cherokee would remain relatively unchanged. Remedy the rear seat discomfort by adding a few inches in front of it and reclining it 5 degrees or so.
The Liberty would get a solid front axle, true round headlights, and a rear-mounted spare tire. There wouldn't be any chrome trim on the outside, including the grille. The KK's girly electronic transfer case shifter would be changed back to the clunky yet manly mechanical shifter. Standard Goodyear Wranglers would be traded for BFGoodrich or Bridgestone ATs. There would be a Renegade model that would compete with the off-road models of FJs, Xterras, and H3s. Optional equipment would include a rear locker and a front swaybar disconnect. Basically Wranglerize the Liberty in order to bring back the Cherokee owners of old.
The Patriot could be had with a 3-inch lift and off-road tires.
All models would have a diesel option.
Well that was fun... Now let's revolt!

All in favor, please manifest.