You know, for near-omnipotent superbeings, these guys have some problems.
The Piller writing tag-team presents an interesting philosophical argument. If you're already seen and done everything that ever has or WILL be, is there any point to still living ? Well, of course there is, but if nothing else it's a reasonable basis for a "Q" episode and sets events into motion that will be seen in 'The Q and the Grey' later in the series. The episode has a TNG-type flair to it, probably due to De Lancie's usual excellent job. A nice comical episode in the spirit of the Q, but with consequences.