I wouldn't think that poster specifically meant "develop a journey system like TOR for Star Wars". More "develop a system that evokes Star Wars as well as TOR evoked Middle Earth." Which Francesco did by a very, very, very close and insightful reading of the source material.
Journeys are one of the most significant themes in The Hobbit and LotR, so the resulting system emphasized journeys. So the question for a designer would be "What are the most significant themes of the Star Wars saga?"
(And, no, "put the same two droids into every scene, even if that involves a stealth commando mission on a forest planet" should not be one of those themes.)