Why Treasure Planet's ships resist engineering redesign

How could Treasure Planet's ships be redesigned to use their fictional technology more effectively?

The setting gives too few rules for its magical technology to support a defensible engineering redesign.

The film does not establish enough engineering limits for its magical propulsion to support a reliable redesign. The wooden age-of-sail forms may reflect a visual choice, or the fictional technology may require ships to look and operate like sailing vessels. Without knowing what the masts, sails, and hull actually do, moving or replacing them becomes guesswork. A defensible redesign would need explicit worldbuilding rules before real-world naval assumptions could be applied.