I've got the same problem soon to be made worse. I have a very small rig and it still makes a huge difference to tow off level.
I tow a 23' 6500# fiver that rides about 1.5" high behind my 2006 GMC 1500HD. I want to get a newer 3/4 ton but they are all so high! My trailer axles were flipped when I got the trailer and the rise already requires me to use a folding step to reach my trailer steps. Any higher and I'll have to buy a new three step trailer step.
With only the slight tilt I have the rear axles have about 400# pounds more load than the front. This results in slightly higher tire temps when towing and a noticeable increase to rear axle tire wear.
The only solution I can think of when I switch to a taller truck is to LOWER the truck!
