I remember Toto-rak was like that in 1.0. Depending on which door of three you picked you'd get a different boss, though people only ever did the third and hardest to get to door to maximize reward payout. It was a great way to farm seals when you got tired of running caravans. Sadly, if they did add paths to the dungeons you'd still have people just going the route of max reward invalidating the paths in the process.