I have been on RV forums for around 12 years now. It seems that owners of shorter rigs with long rear over-hangs, and owners of longer rigs with shorter wheels bases, have handling issues and often consider suspension upgrades to improve handling. Based on that, it is easy to conclude that a long wheel base with a short over-all length is going to naturally handle better. Then add to that, a B+ cap instead of an over-head sleeper, angled transition walls, a lower over-all profile, everything in combination are additional positive influences for a better handling rig. It does explain why some of us say their rigs need help, and others who think the complaints are unfounded.
Our rig has a 158" wheel base and an over-all length of 23-8". I feel we have a lot of rear over-hang when considering the wheel base. Our 2007 E350 chassis from Ford did not include any kind of rear stabilizer bar. Ford started included one in 2008. We invested further in heavy duty front & rear stabilizer bars, heavy duty shocks, a Safe-T-Plus steering stabilizer, a rear trac bar, and a front wheel alignment. All in combination, the improvement was dramatic. For my wife and me, adding another $3900 to a $70,000 purchase was one more upgrade, just as we invested in other upgrades. The suspension upgrade improved our over-all safety and driving & riding comfort, which also stabilizes our rig when parked eliminating for the need for stabilization jacks. My wife is very comfortable driving our rig with tow vehicle, a huge benefit all by itself.
Since 2007 when we had all the work done, I learned that I could have saved a lot of money by buying and installing nearly everything myself, saving 1/2 to 2/3 of our $3900 investment.
