Great Tow Capacity - Bad Payload Capacity... Increase PL?

Don’t worry about the truck. Coils are a bit soft on initial travel, but they are durable.
Literally nothing else to worry about up to about 7500 lbs on the rear axle, except spring rate. Payload number is a fake number to equal the magic 10klb gvw assigned to class 2 trucks until recent.
If it makes you feel better, I’m hauling somewhere between 1500-2000lbs tongue weight, on theOE hitch receiver, no weight distribution.