I ran out to that section of 7200s behind the dump, because it's the nearest dirt to my house and is incessantly potholed. I don't think I could get the truck over five miles an hour... if it wasn't wiggling around like a bowl full of jello, it was bouncing off the bumpstops and knocking my teeth loose.
A little bigger tire with lower PSI will help. But the coil swap is definitely happening.
We should go try the same road in my F350? I don't think it'll be a whole lot better but I hope I'd be surprised?