I agree with redrocket and apt. Learn the theory behind the operation and proper setup of a WDH. There's plenty of info available on the internet. It sounds like your system was never setup correctly and now you are trying to address the symptoms created by poor setup.
It seems that most (possibly not all but I'm not sure) dealer service and deliver departments are basically incompetent. Some of the stories I've heard and things I've witnessed are unbelievable. I guess they just want you off the lot as soon as possible after the sale. It seems the average "RV tech" of today is simply not qualified to be working on RV's.
I'm not even sure I would listen to some of the information provided by the truck manufacturers (provided the statements on here that are attributed to them are accurate). I can see no logical reason why it would not be a good idea to restore as much TV front axle weight as possible. If the truck manufacturer doesn't think the truck needs as much front axle weight as the truck was designed to carry then why did they design it that way?