1/2 ton SAE J2807 tow ratings

This will fix nothing! As noted there are many other factors that affect towing capacity than a few tests on who can pull a stretch of road faster or brake a couple of feet shorter. Frankly the makers now provide all the information needed to make a good decision if the user will spend a few minutes educating themselves rather than throwing money at a dealer to get the "hottest" new truck. The latter will continue to do the same dumb stuff and make excuses on why the dealer or the RV maker is at fault.