I also brought up that point, and what you say is very true. But still... with this joy squid, they actually had almost the opposite for most of the time - they thought they were fictional and destined to die. In Back To Reality although there is a slow build it never really starts out at the opposite end of the emotional spectrum. Cat is in despair as soon as he awakes, Rimmer is as soon he finds out who he is supposed to be. Lister and Kryten are ok but not really joyful, just normal until they come across the totaliterian posters. In back to earth there is no slow build but a 180 degree turn. It would make more sense to me for a joy squid to make them hallucinate an earth where Lister meets Kochanski, Rimmer is hailed a hero, the cat has loads of women after him.... more like better than life. That's just my feeling. I don't think the end really worked.