Quote Originally Posted by Niwashi View Post
PotD ... you lack the standard responsibilities of your job's normal role within the party
But what you don't lack is access to all your actions, so you can enter floor 51 solo and see what sort of panoply you're working with, read tooltips, arrange bars, and see if your bindings meet your personal expectations.

This makes it a superior playground to standard party content, especially for BRD and MCH, who without the Palace could spend days playing normal content, thinking they enjoy the job, only to find as they get closer to 60 that they don't enjoy post-50 BRD. Reading the action tooltips and experiencing their effects as an acting Lv60 character will give someone a basic idea of whether they like a job or not, without wasting leveling time that could have been applied to something else.