I rotate my tires about every 8000 miles or so and it always drives sooo much better after I do. I can tell when it needs to be done because it does start to ride funny even when keeping my air pressure at 32. But I have a single cab with a tool box loaded down in the back, so my handling characteristics are different than the 4 doors.

 

I gotta believe it's the shocks as well. Mine feels like every other car/Jeep/truck I've ever had when the shocks wear out...it just bounces all over when you hit a series of bumps. Most OE shocks on any vehicle aren't great, I just thought these would last a little longer. I've only got 16k.