Air Bags

Long and short of it is that most front end rise due to hitch weight is related to the suspension, not the loss of weight from front axle due to the load behind the rear axle.

Makes me think that as far as a weight distribution hitch goes, it's really the act of raising the back of the truck that makes the difference in ride stability rather than the transfer of weight to the front.

Adding the airbags did not make or break my setup but I did notice that there is a lot less bounce in the back when I hit those type roads that have those wavy surfaces. More than likely, my WDH is doing less work now too.

Bingo!

Just my opinion, but with todays HD suspensions, the truck is built to handle so much more weight then they once were it makes judging vehicle angle and WD a much different process. I do know that with Heavy trucks, (Semis), weight movement is never an exact science, as you move a 5th wheel, sure you should move X kg from this axel to this axel, but it does not always work that way because of the dynamic nature of the units weight, length and suspension (hugely exaggerated due to air suspension). From what I am hearing you actually have a solid setup and the airbags are doing exactly what they are supposed to.
Happy Camping!