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Even though you won't get Soul Ash (required to craft Legendary Gear which increases player's power) for completing Twisting Corridors layers, compared to common Torghast wings, the unique cosmetic rewards the player obtains for reaching higher layers won't disappoint you.
In addition to getting some Stygia and achievements for completing each new Twisting Corridors layer:
Every new player will have to complete all 8 layers in Torghast Twisting Corridors Challenge Mode basis because it is the only source of obtaining the special Corridor Creeper mount which can be ridden in the Maw.