I think requiring a highway drive for a regen is pretty normal for a light duty diesel (1 ton vehicles or less) with these modern diesel emissions. This isn't just a Jeep thing. They need to build a lot of heat in the exhaust to clean it out and the constant load is part of the process to help generate this heat. Heavy duty trucks may do this while sitting but their engines rev to generate the required heat and are designed to spend an indefinite time running while stopped as many operate auxiliary equipment. Mine has been unnoticeable and have put on 12000km now but I do some freeway driving as part of my regular routine.I'm not a two footed driver.
My GC EcoDiesel has been out of service for 21 days now. They just replaced the catalytic converter. And next they will replace an O2 sensor. Even if they get it to run without throwing codes again, the underlying engineering problem remains. This vehicle is incapable of "parked regeneration". To regenerate it must be driven at highway speeds. What rocket scientist at Jeep/Chrysler/Fiat thought it was a good idea to put in an engine that requires driving at highway speeds to clear a problem? I mean, the vehicle is designed for serious off road play. How many Jeep Ecodiesel owners are going to get stuck in limp mode, stuck in 3rd gear, in the back country somewhere because they can't get to a highway and drive at highway speeds to regenerate? Someone, maybe many, at Jeep are spending way too much time in their cubicles and not enough time driving these things in the environments they are intended for.