I'd concur about Prospero's creation of the 'Imaginative Journey' on two levels; amongst the characters and the audience. HSC markers usually value 'effect on the responder', so this could be valuable.
Presumably, this effect consists of the journeys characters and responder undergo, in their perceptions of others, and ultimately, themselves, as illustrated in the following quote;
Gonzalo-Was Milan thrust from Milan, that his issue
Should become Kings of Naples? O, rejoice
Beyond a common joy, and set it down
With gold on lasting pillars: in one voyage
did Claribel her husband find in Tunis;
And Ferdinand, her brother found a wife
Where he himself was lost; Propsero his dukedom
in a poor isle; and all of us ourselves
where no man was his own. (Act V, Scene I.)