One of the reasons I have adjusted mine a few times is the iniitial adjustment once loaded, then the correct shank was delivered. So once I swapped the shank out (new one is longer!) I readjusted the set up.
The air bags to compensate for when the bed is loaded vs unloaded is something I have considered so the hitch height is a constant. Regardless of how much you try to keep the weight right behind the cab, some has to go on the rear axle, changing the hitch height depending on just how much weight is there!
Not sure about the older DC's, but I noticed our cam arm bracket (that pivots on the frame mounted bracket) have a little bit of "movement" allowing some rotation. Not sure if this is on the new model only or not (ours is brand new this July).
Once set up the design behind the DC is hard to beat, except maybe by a PP or HA system.