This is how I stopped the unloading. Run a limiting strap in the middle. Set the limiting strap just long enough that it stops the axle just before the revolvers open. Under hard braking there is no way they can open. But as they flex it will not be hindered by the strap ( I've checked).
Now, to stop the ( lost ) traction. A cheap pair of airshocks have a surprising 11" of travel ( 15.5" closed, 26.5" open ). When set-up they have a single inlet ( great for off-roading, NOT good for on-road). The shocks always try to give 50/50 pressure, forcing the tire to the ground.
On road, run the shocks with separate inlets ( no air transfer ). Gives the truck a lot of stability.
Just don't overinflate them. Not good for the mounts.