I'm sure the suspension got a good work out and the bumpstops were probably forced through the frame rails, and although I wouldn't want to buy that after knowing what it has been through...it's far from a beating from hell. That seemed light vs. how some people drive through the rocks out here.
I wouldn't be surprised if the steering knuckles weren't bent after that (unless they had been gusseted). Those knuckles are a weak link if you're going to be jumping like that. With a bit of strengthening/gusseting, a 4th gen could be capable of more than you think.
I think the bare minimum beefing I'd do if I wanted to do that with my 4th gen would be a full front to rear cage to keep the frame in check.