I think of TWOWS as an Icarus story:
"Son of Daedalus who dared to fly too near the sun on wings of feathers and wax. Daedalus had been imprisoned by King Minos of Crete within the walls of his own invention, the Labyrinth. But the great craftsman's genius would not suffer captivity. He made two pairs of wings by adhering feathers to a wooden frame with wax. Giving one pair to his son, he cautioned him that flying too near the sun would cause the wax to melt. But Icarus became ecstatic with the ability to fly and forgot his father's warning. The feathers came loose and Icarus plunged to his death in the sea."
Jordan is 'imprisoned' by his mere mortal life of meager financial means. Through a combination of advice from Mark Hanna and support, both emotional and via drugs from Donnie Azoff, Jordan 'escapes' his mundane Old World and 'flies' off into the New World of wealth and physical pleasure. But he ignores warning signs and flies too high, only to crash and burn.
Those broad strokes convey the basic three movements of the story just like The Hero's Journey: Separation / Initiation / Return.
The question at the end is: Has Jordan changed? And of course, he hasn't, a point the Denouement clearly points out.
The comparison to the Icarus story drive home my sense that TWOWS is at its core a morality tale.